Some thoughts on bullet performance...

Didn't somebody on here a short while ago suggest trying to measure the retained energy of various bullets by chronographing them both before entering and then again on exiting a standard block of gelatine? Wouldn't that give a pretty good indication of the amount of energy transferred from the bullet to the target nedium? Perhaps not quite what gitano is after but a relatively easy experiment to conduct, I would have thought.

I've also often wondered how much of a deforming bullet's energy is converted to heat. Being the diminutive size they are I doubt this would be retained within the fragments for any length of time. I reckon we would need a senior chemistry set for Christmas to work that one out.
 
I haven't been ignoring the responses, I simply haven't received notice via email that there were any. Let me try to answer in chronological order.

Dalua said:
If you have time, perhaps you could expand a little on the parts of the arguments you consider logically flawed?
I smell 'bait', but I may take a bit and note the specific areas with which I find logical
'flaws'. If however, I feel the slightest 'tug', you can expect me to spit the hook.

tamus said:
Good read. Actually seemed quite logical, which makes a nice change.
I suspect that is a poke, but taking it on face value, there are a great many 'propositions' made in this world that appear both "logical" and "make sense" while all the time being completely wrong. Such is the very foundation of the business of politics AND religion.

Dalua said:
I must confess that I do not understand the purpose of the expression in terms of watts of the energy presumend to be transferred to the target animal.
I don't particularly care for the term "watts" or "joules" either as neither is particularly "common" in the shooting/hunting fraternity. However, what I was really trying to get across was the concept of "Power". The "watt" is (one of) the units used to express "power" in the physics sense and is a function of time.

In physics "power" is the rate that "work" is performed on an object. "Work"is defined as transfer energy to that object. "Power" is how "FAST" that "work" is applied.

The physics definition of "work" is "force" times "distance"... W = F * D.

When something moves a "distance", even if it travels at the speed of light, it takes "time". It was necessary to estimate the distance the bullet traveled in order to get the "time" that the "force" was applied to the animal so I could calculate the "power" transfered.

Also, do not confuse the term "watt" with "heat". "Heat" (no such "thing" in physics) is often described by the word "watts". However, the unit "watt" is not a measure of "heat", it is a measure of power - a force applied over time. (I know, I know, all sorts of "heaters" express their "heatability" in terms of watts, but it's like looking at something "sideways". What the term watts really means is how much "power" those heaters generate - the heat produced is indirectly proportional to the power generated.)

I think I may have not clarified the reason I undertook for so long an effort to find a quantitative "solution" to an observed phenomenon that a great deal of people knew was true.

The first (as far as I am aware anyway) time the conflict between the "slow and big around" and "fast and small" crowds went public was in the writings and speeches delivered by Jack O'Connor (small and fast) and Elmer Kieth (big around and slow). When I was young, I was a devotee of O'Connor. Over the years, experience has shown me the value of Elmer Kieth's point of view. In the end, I have decided that both of them were "wrong" TO DENY THE OTHER'S POINT.

Still to this day there remains those that "swear by" kinetic energy (small and fast), and those that "swear by" penetration (big around and slow). And still both are wrong when they deny the TRUTH of the other perspective.

I am old enough that I couln't care less what "camp" someone else is in UNTIL...
They start telling me I'm WRONG, or that it's "unethical" to use a certain bullet or cartridge or whatever they think is either "right" or "wrong". I'm sick of that crap. SICK OF IT. I was seeking for myself a "physical" explanation of what I knew was true... Small bullets, going very fast, kill very quickly and "cleanly". This was the result of several "accidents" with bullets that were "too small" to "work". As I continued to use the "wrong" bullets, and continued to kill game cleanly and quickly, I KNEW there was a physical explanation for the observed results, and some nebulous term like "shock" - totally unquantifiable - was insufficient to satisfy me.

By looking at "power" it was easy to "see"- quantify - (which means objectively evaluate instead of emotionally evaluate) and compare "big and slow" and "small and fast". Here's the result of an objective comparison of "big and slow" and "small and fast" as the terms pertain to "lethality":

If you look at the "power" dissipated by a bullet as it transits a big game animal, the "power" figures 'square' very nicely with what people have been observing for the past 80 years or so in term of "lethality".

Again, my interest is neither in "convincing" anyone this is either 'true' or 'correct' - it simply IS in a mathematical truth. If someone 'wants' to 'believe in' some unidentifiable, unquantifiable magic 'power' like "shock", it matters not one whit to me... UNTIL they start telling me I "wrong" in my choice of tools, or worse yet, it is "unethical" to use some specific tool. THEN I will engage in "conversation" employing all the quantitative and logical skills I can bring to the "discussion".

irwich said:
Didn't somebody on here a short while ago suggest trying to measure the retained energy of various bullets by chronographing them both before entering and then again on exiting a standard block of gelatine? Wouldn't that give a pretty good indication of the amount of energy transferred from the bullet to the target nedium?
I think it would. However, I have two comments with respect to that:

1) My proposed experiment wasn't to tell how much energy was "wasted" going through an animal, it was to quantify the timing and shape of the pressure curve and how much power it was necessary to generated in stopping the bullet. If the bullet goes through, you can only guess at the power generated UNLESS you have the transit time of the bullet.
2) We'll be using your chronographs. :) I have complete faith that a bullet traveling through a ballistic gelatin block WILL find a way to veer sufficiently off course to strike the legs or sensors of the rear chronograph.

irwich said:
I've also often wondered how much of a deforming bullet's energy is converted to heat
Again, watts does NOT equal "heat". "Watts" is ONE term/unit of "power" (of several) which in turn is the "time" a "force" it applied to a "system".

I'll look again at the reference listed above and see if I want to expend the energy necessary to appropriately address the 'issues' I have with what the author wrote. I might be a bit more enthused if I didn't have the feeling that I was being baited into an argument the likes of "don't confuse me with facts, my mind is made up". That's what O'Connor and Keith did for decades. I have better use for my time.

Let me be as clear as I can... I'm NOT accusing anyone of baiting me at this time. I just saying that 10 years on "the net" has imparted a certain 'sensitivity' to someone looking for a rumble, and I'm getting that sense with regard to "challenging" a writing that the folks at this site clearly think well of. There's really not much to be 'gained' by calling to question ANYTHING that can't be proven. Those "discussions" are purely exercises in futility.

If it looks like I can CLEARLY explain some logical flaws in his assumptions, then I will. If not, I have neither the time or inclination to engage in that exercise.

Paul
 
I was trying, with my allegory of the room and the heater, to demonstrate that the room is made to warm up by joules of energy converted by the heater from electrical potential energy to infra-red radiation (or whatever) which causes the air in the room to warm up.
In order to tell how much he room is going to warm up, we need to know not the wattage of the heater, but the number of joules of energy which have been introduced to the air of the room in a warming form.

My view is that in a similar way, the damage done to a deer is caused by conversion of the kinetic energy which is a property of the flying and spinning bullet (which, like the electric energy is 'potential', in that not all of it will damage the deer, just as not all the electrical energy will heat heat the room) into kinetic energy of bits of both the deer and bullet that result from the collision and do severe damage, in the case of a soft or hollow-point bullet, to both.

To me it seems likely that the amount of damage done to the deer and the bullet is a direct function of the amount of energy (joules, if you like) expended in the doing of that damage, just as the temerature rise in our perfectly-insulated room is proportional to the amount of energy (joules) introduced into it.
The rate of introduction of that energy (joules/second or watts) seem to me of little importance in either case.

Please don't feel obliged to explain the logical flaws you see the the 'Rathcoobe'-man's argument. I'd just be interested to know which of his assertions you think are flawed in that way; then I could have a harder llok at them, and I might see the flaws myself.
 
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Good read. Actually seemed quite logical, which makes a nice change. /QUOTE]

I suspect that is a poke, but taking it on face value, there are a great many 'propositions' made in this world that appear both "logical" and "make sense" while all the time being completely wrong. Such is the very foundation of the business of politics AND religion.

Poke?... Probably a poke at psuedo science Yes. Specially when it's that; I've got this opinion and here's the stuff that says I'm right, type of psuedo science. There are, I will concede... some... propositions which at first appear reasonable but which do not bear up under scrutiny. God might be one of those. Politics rarely makes much real sense, except in tiny narrow circumstances, because we all know that there are always "other" agenda. Getting voted back into power is the prime one. However, I did say "seemed quite logical"... It might be utter hogwash.
 
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There are, I will concede... some... propositions which at first appear reasonable but which do not bear up under scrutiny.

The following simple calculation can be easily employed to determine the veracity of the majority of on-line discussions about ballistics - .

Take a projectile of known mass and label it P.

Measure the angle of incidence, i, between the bullet's flight and the orientation of the animal.

Measure the length of the wound channel, l, across the body of the animal from entry wound to exit wound.

Measure the diameter of the exit wound, E.

Now record the manufacturer of the bullet. The value assigned to this variable is derived from tables and is used to denote its origin, O.

Also from tables derive a value for the frangibility of the bullet - F.

Hydrostatic shock is a regular feature of such debates and is represented by the letter S.

Hodgdon reference powder H1 will provide the constant required to determine the amount of hot gas generated.

t represents the number of times the topic is presented for debate. Use capital T if contributors express dispair at seeing it brought up again.

e represents the number of expletives contained within subsequent comments. Use capital E if the contributor is expelled.

Using the above we can then calculate how reasonable the proposition is without unecessary gainsay or argument. For example,

6.5s are better than .308s = PilE OF SH1tE

Seemples!
 
The following simple calculation can be easily employed to determine the veracity of the majority of on-line discussions about ballistics - .

Take a projectile of known mass and label it P.

Measure the angle of incidence, i, between the bullet's flight and the orientation of the animal.

Measure the length of the wound channel, l, across the body of the animal from entry wound to exit wound.

Measure the diameter of the exit wound, E.

Now record the manufacturer of the bullet. The value assigned to this variable is derived from tables and is used to denote its origin, O.

Also from tables derive a value for the frangibility of the bullet - F.

Hydrostatic shock is a regular feature of such debates and is represented by the letter S.

Hodgdon reference powder H1 will provide the constant required to determine the amount of hot gas generated.

t represents the number of times the topic is presented for debate. Use capital T if contributors express dispair at seeing it brought up again.

e represents the number of expletives contained within subsequent comments. Use capital E if the contributor is expelled.

Using the above we can then calculate how reasonable the proposition is without unecessary gainsay or argument. For example,

6.5s are better than .308s = PilE OF SH1tE

Seemples!

:D
 
Dalua said:
The rate of introduction of that energy (joules/second or watts) seem to me of little importance in either case.
And therein is precisely where we disagree. HOWEVER, I don't think the disagreement is particularly significant other than to the discussion of "small and fast" vs "big and slow".

As I understand you, and I don't want to put words in your mouth, you are focused on the mechanical rending of flesh as the primary "measure" of "lethality". (I use quotation marks when the word or term I am using is either undefined or open to interpretation.) That's fundamentally a "big and slow" argument. I do not argue against that as valid. What I argue against is the rejection of the importance of "speed" in "lethality". It has been demonstrated over and over an over again, that small fast bullets ALSO produce "instantaneous" kills. My goal was to find a way to explain objectively and quantitatively what has been observed for 80 years or more.

In my mind, the "conflict" between the "big and slow" camp and the "small and fast" camp is silly. Both have demonstrated that their concepts produce humane kills. The CONFLICT arises when the "big and slow" people want to LEGALLY eliminate the "small and fast" projectiles or firearms that shoot them.

Let me see if I can abstract the idea to illustrate what my thesis is.

It is easy to look at a person across a small room and see them moving their mouth and then hear them talking to you. There is a direct and visible relationship between their lips moving and hearing the sound of their voice. It is not a conceptual 'stretch' to say that the speaker is producing sound and the listener is hearing that sound.

Now let's take a fisheries sonar system that transmits at a frequency far outside that of human hearing. We submerge it in water, "point" it somewhere, and get marks on a piece of paper or video screen that "tell" us that there are reflections from fish below. Such a system is fundamentally 'magic' using Einstein's definition - "Any technology sufficiently advanced is indistinguishable from magic." Without a method to objectively prove that there is in fact sound emanating from the transducer, that sound bouncing of a fish's gas bladder, and the transducer receiving the reflected wave and converting the sound energy into electrical energy for display, the actual working of a fisheries sonar system would have to be taken on faith. The fact is, the public OFTEN challenges the "workings" of fisheries sonar data when they don't like the fisheries management decisions made based on sonar data, and they do so fundamentally because "how it works" cannot be detected by "the average Joe". It's "magic".

In our case of terminal ballistics, the "sound across the room" is analogous to the "big and slow" argument regarding the very visible and "logical" wound channel. The "small and fast" is analogous to the fisheries sonar in that while "how it works" cannot be directly observed like a wound channel can be, the fact that it works is patently obvious. I was trying to "do the math" to illustrate the "how it works" part of the "small and fast" bullets that so clearly "work". To me, the argument between the "big and slow" and "small and fast" proponents - like O'Connor and Kieth - is akin to the "talking people" and the "sonar people" trying to argue that the other sound system "doesn't work". I simply wanted to find a 'ruler', if I could, that would explain the "how it works" of "small and fast". The power transfer function does that.

Outside the "wound channel" vs "power transfer function" disagreement, I think we are pretty much on the same page.

Tamus - My "poke" remark (paranoia?) was based in the linguistic differences among the English-speaking people. The British are well-known for their 'rapier' wit. And while they generally spare no one, Americans, a culture that on the whole does not take pride in having a command of their native tongue, seem to be 'easy prey' for English sarcasm. Recognizing that I could simply be "missing something" between cultures, I said I would take your comments at face value. Which I did.

With respect to the businesses of politics and religion: If someone doesn't see that politics IS business, (and I'm sure you do), then there isn't much to discuss on that front. As for "God", I was careful to use the term "religion" so that there could be a distinction between the BUSINESS of RELIGION, and belief in God. While the men in the business of religion try to equate their business with belief in God, it is not necessarily so. In my opinion, the business of religion is hogwash. Belief in God is not connected to business and neither is it a "scientific" matter. Rather, belief in God, in my opinion, is a spiritual matter. From what I read of your posts, I would say that I also think we are 'singing from the same sheet of music'.

irwich said:
The following simple calculation can be easily employed to determine the veracity of the majority of on-line discussions about ballistics - .
Emphasis mine.
I'm afraid I would take exception to the use of the word "veracity". By the Oxford dictionary's definition, "veracity" is "Devotion to the truth. Truthfulness." Personally, I would stop short of calling "the majority" of the people that participate in discussions of ballistics liars, or even to question their "veracity". "How reasonable the proposition is" however, is something to which your equation might very well apply.

Look, I'm just offering a 'new take' on an old argument. I have no illusions or delusions or even desires to change anything. I simply don't care about "changing things" any more. I've broken too many swords on that sort of endeavor. However, I do like to "air" my ideas so people can 'poke' at them. I WANT my ideas to be challenged. I'm a strong believer in the premise that such challenges accomplish one of two ends: Either the idea withstands those challenges and is sustained (only to me is sufficient), or a critical flaw is revealed and I have to modify or abandon it. All I hope for is reasonable, non-personal challenges to the idea/concept. As far as I am concerned, that has been the case here.

Dalua and Tamus - I will read the Rathcoobe document and get back to you in private mail.

Paul
 
I'm not suggesting any measure of lethality. I'm just pointing out that overwhelmingly often, the death of a well-shot animal can be attributed to the failure of the cardivascular system to provide adequate oxygenated blood to the central nervous system to support life, or to physical destruction of necessary bits of the CNS by bullet and or bone-fragments.

This can result from a number of causes, all of which require the bullet to do work on, or to transfer energy (joules, ftlb, Nm) to, the beast. The difference in the time-period of delivery of these joules between lower and higher speed bullets strikes me in this context to have little to add to the debate; in both cases, they're very quick by any ordinary measure. Hence my query about the introduction of watts, or joules per second, into the debate. The amount of work, or damage, done to the beast is more likely, like the temperature rise in my room, to be related to the number of joules expended in doing it, rather than whether they are expended over one incredibly short period of time, or a marginally less short period.

Big and slow, small and fast; why choose?
I would suggest bullet-type and velocity matched to quarry and conditions, coupled with adequate placement of the bullet so that it achieves the physical effects needed for swift demise of quarry.

I understand the concept of transfer of energy, but the transfer of power (=energy/time) which you describe is less straightforward.

I'm unsure why separate theories are required to explain why different speeds of bullets kill things.

By all means p.m. your thoughts on Rathcoobe if you wish, but perhaps it might be more instructive to continue the discussion in public, in case anyone is still awake;)
 
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Dalua said:
I'm unsure why separate theories are required to explain why different speeds of bullets kill things.
Is answered by:

Dalua said:
I would suggest bullet-type and velocity matched to quarry and conditions, coupled with adequate placement of the bullet so that it achieves the physical effects needed for swift demise of quarry

Let's say you want to use a "small and fast" bullet for a particular quarry, under specific conditions, coupled with adequate placement of the bullet leading to the swift demise of your quarry, but I - the LAW or some form of "ethics police" - do not allow you to use that "small and fast" bullet/cartridge/rifle combination because I don't BELIEVE that "small and fast" bullets "work", and there is no objective explanation on "how and why" "small and fast" bullets kill "instantaneously", long before 'lack of oxygenated blood" would cause loss of feet or consciousness.

Paul
 
Ah the ethics police, the same law framers that decided we need to be humane when despatching pests but can be inhumane when killing fellow man!
 
and there is no objective explanation on "how and why" "small and fast" bullets kill "instantaneously", long before 'lack of oxygenated blood" would cause loss of feet or consciousness.

In my experience (mainly 100gr from .243 at red deer hinds) they usually don't unless used for brain/neck shots, or perhaps when the amount of energy imparted to the animal is proportionatly to its mass very high, e.g. 50grains from a .22-250 entering, but not leaving, a fox's chest; although even in those cases I've never bothered to exclude by investigation the possibility that bits of rib or bullet might have clobbered the spine.

I have some difficulty with your definition of 'kill', which from your first post includes anything that prevent the shot beast getting up to escape you. This clearly would include a number of kinds of damage to legs and hips, as well as to the spine, which would leave the animal in your parlance 'killed'; and while I can see the use in the field of this very practical definition, in my view and in fact, such animals might well be very much alive and more importantly perhaps, not even moribund.
 
Let's not pick nits here. I'll stick with my definition of "dead" and trust any reasonable person to understand that I wasn't referring to leg-shot animals in the context of bullet performance and "death".

Let me gingerly tip-toe into the differences in the choices of arms available to "European" hunters and American hunters, and offer, with respect, that the 'average' American hunter probably has more opportunity to shoot big game with small bullets than the 'average' "European" hunter does. That's NOT to pull some sort of 'one-upsmanship" on the discussion. Rather, I am simply recognizing your own acknowledgement of the spectrum of cartridges, bullets, and game from which you are basing your conclusions.

Also, something I should clarify again, I am NOT a "small and fast" devotee. I "like" bullets that are big around and the cartridges and rifles that shoot them. However, I acknowledge that that "like" is purely emotional, and I make no attempt to dissuade anyone from using "small and fast" as they see fit. I am engaged in this discussion on the "side" of "small and fast" only in the context of objectively explaining what I consider to be a plausible, and objective explanation for the "instantaneous" kills that so often occur with "small and fast" bullets.

Let me amplify the term "small" and include "light-weight" as part of "small". This is no 'slight of hand' or attempt at change of subject on my part, as "small" bullets are most often pooh-poohed in the context of "penetration" (AKA "wound channel"). It is reasonable to state that small-caliber bullets are generally light-weight and big-caliber bullets are generally heavy. (I note the exception of few "light-for-caliber" bullets for the 6.5x55 cartridge, and the surprisingly heavy-for-caliber 160s.) Among the greatest "charges" against "light-weight" bullets, be they light-weight due to caliber or due to design and materials, is that they "don't penetrate", or that they "blow up on the surface". While EVERY bullet design from EVERY cartridge and EVERY rifle has had some form of "failure" described, the assertion that "light-weight" or "hollow pointed" bullets "blow up" or "fail to penetrate" in the "norm", is just flat wrong. There is simply too much incontrovertible evidence to the contrary.

If one single characteristic of the history of hunting bullet design and use can be found, it is the extra-ordinary prevalence of mis-information, ignorance and outright dishonesty on the part especially of "gun-writers" (ptooey), but only slightly behind them, manufacturers. Throughout the 20th century, the "gun-writer" became THE marketing tool (shill, in many cases) of various bullet manufacturers. In some cases it was just ignorance (no excuse). In some cases it was outright dishonesty. Rare are the cases where truth and objectivity were the primary goal. Let me start with "spitzers".

It is reasonably well agreed that the Germans did most of the preliminary work on the "spitzer" (pointy) bullet design. The SOLE reason for the change from first round ball and then round-nosed projectiles was the development of the math of ballistics. (Most of which was accomplished by a French general working for Napoleon Bonaparte.) The German military machine jumped on the "engineering" and worked out most of what is still the "spitzer" shape. In point of fact, the spitzer of the 21st century is only very slightly different than the 'experimental' spitzer of the latter 19th century. Once the spitzer's improved trajectory was demonstrated to the public - through the writings of "gun-writers" (ptooey) - hunters 'all over' wanted "spitzers to hunt with. They "needed" that extra "flatness". The "ethicist" gun-writers (ptooey) claimed that flatter trajectories would lead to less need for good range estimating skills and would by extension lead to more "humane" hunting, and therefore it was a matter of "ethics" that spitzers should be used.

Trouble was, the bullet manufacturing industry hadn't caught up to the military industrial machine, and the only "spitzers" available were those with full metal jackets (FMJ). Oops. In the hunting fields, FMJs don't "work", and it was obvious quickly. Of course those idiot gun-writers (ptooey) that had railed against those "new-fangled" bullets were the first to climb up on their high horses and proclaim the "uselessness" of the "spitzer". The idiot ethicists immediately climbed on their self-righteous high horses and now proclaimed that use of "sptizers" was UNethical. And the truth was nowhere in sight.

Nonetheless, not-stupid people realized what the "issue" was, and set about to make a "pointy" bullet that would "open up" on game like a round-nosed bullet did. And the first spitzer hunting bullets finally showed up in the civilian market. (In fact, the development of the "hunting" spitzer was, at least in part, what lead to the "out-lawing" of "exposed lead points" in military ammo.) The gun-writers (ptooey) figured out how to save face, and "pressed on". HOWEVER, that original battle between the "round-nose" gun-writers (ptooey) and the "spitzer" gun-writers (ptooey) continued for almost a century. It still flares up now and then.

The next big design issue, was "hollow points". Contrary to popular myth, the development of HPs has it's origins in gyroscopic stability, NOT terminal performance. Trained ballisticians wanted to move the center of mass (AKA center of gravity or CG), rearward so they could use the slower twist rates of all those old rifles they had in their military arsenals and still stabilize their 'new' spitzers. The way to do that was to "lighten" the nose. The "lightest" nose you can get is no nose at all, which is "hollow". Here we go again. This time, the idiot gun-writers (ptooey) jumped on the "we hate it" bandwagon, and came up with all kinds of examples of "crippled" game due to so-called "blow-ups". Some even stated 'bald-faced' that they had "seen a .30 caliber bullet blow up on the hair of the deer and never even penetrated the skin. The deer ran off unscathed." Gee, if the deer ran off, exactly how did they determine it was "unscathed"? Just more "gun-writer" (ptooey) bullwash.

Again, not-stupid people analyzed the 'issues' with MILITARY hollow points, and worked out a hollow-point design that that "worked" as a big game bullet. They called it the "Ballistic Tip". However, it took about 40 years. In that time, the idiot gun-writers (ptooey) and "ethicists" had a free-for-all pushing each other out of the way as fast as they could to get in the front of the line to bad-mouth HPs. As a result, there were no less than two full generations of hunters that grew up believing that hollow pointed bullets for big game were "unethical". When the "Ballistic Tip" first came out, the gun-writing (ptooey) fraternity was confronted with a serious dilemma: On one hand, they had been mean-mouthing the hollow pointed bullet as a big game bullet for longer than many of them had been alive. On the other hand, many of their 'brethren' were paid shills for the very manufacturers that had invented the "non-hollow point" hollow point. Oh deary me, what can we do? They decided to do just what they had always done: Those that were used to it anyway just continued to lie, and those that didn't want to lie simply moved on shamelessly, mostly by never using the "HP" word as they extolled the virtues of the "new" bullet design of their benefactors.

Before I get jumped on about the "poor performance" of "Ballistic Tips" (BTs), it should be pointed out that today's BTs are not the BTs that were first introduced to the hunting public. Those first ones had "normal' (thin) jackets, and the terminal performance on game was variable. Some did in fact perform poorly on big game if the impact velocity was very high, and some performed excellently. However, the velocity range over which performance was best, was small. The manufacturers worked on jacket design, and the newer forms penetrate to greater depths than many of the 'old' round-nosed bullets of similar weight do.

So... Here we are, discussing "terminal performance" in the 100-year-old argument around "wound channel" vs "shock".

In order to discuss my experiences ON GAME with "inappropriate" bullets, it is impossible to avoid sounding immodest. Please believe me when I say I list examples NOT to "win" with some form of "credential", but rather to cite many, many first-hand experiences that fly in the face of the "myths" initiated by gun-writers (ptooey) about "light" or "small" or "hollow pointed" bullets going very fast.

I have lived and hunted in Alaska for more than 50 years. I have shot every big game animal found in Alaska except bison, elk, coastal brown bear, and musk ox as well as mule deer and prong-horned antelope with the Speer 115-grain hollow point in 7mm. I have never lost an animal. Not one has left the tracks it was in when it was shot. Only once have I lost what I considered an 'unacceptable' amount of meat - approximately 5 lbs and that was because I chose the "humane" shot instead of the "meat-saving" shot. Almost ALL of these animals dropped like a stone upon impact. WAY before they would be "out of oxygenated blood". I NEVER intentionally shoot a big game animal anywhere but behind the shoulder. Anyone that cares to entertain the position that bone fragments impacting the CNS caused every one of over a hundred "instantaneous" deaths, are free to do so. But there is no 'discussion' left in that conversation.

Second, I have been using the .17 Remington cartridge in a model 700 Remington rifle since 1982. My children and I have taken too-many-to-count Sitka black-tail deer and caribou with that rifle. None left their tracks. None "got away". NONE had "meat loss" that even got "up" to that produced by a 7x57 shooting 140-grain Hornady spitzers. No CNS shots. Again, for those that want to ascribe "dead right there" to "bone fragments hitting the CNS" from a rib behind the shoulder in almost everyone of countless caribou and deer, have at it. But again, there is no productive 'discussion' beyond that point.

A dear and long-time born-in-Alaska friend of mine shoots a .300 Win Mag. He only hunts moose and caribou. I accompanied him on his one and only exception to that, a dall sheep hunt. I load 110-grain spire points for him. He is the consummate "meat hunter". To the best of my knowledge, he has never lost a big game animal, and hates to "chase them" even more than I do. If that "small and fast" wasn't "working" for him - killing cleanly and "preserving" meat - you can bet your last Pound Sterling that he wouldn't have been using it for the more than 30 years I have known him.

It is noteworthy, I think, that the longest shot I have ever taken on a big game animal was 317 paces, and the VAST majority of them have been under 150 yards. My friend is of the same mind and practice.

In at least half a dozen side-by-side shooting instances in which my wife was shooting a 7x57 with 140-grain "spitzers", and I was using a .308 Win using the Speer 130-grain HP, her animals ALWAYS ran at least 50 yards, and occasionally as much as 100. Mine never left their tracks.

Finally, I don't particularly advocate use of the .17 Remington for big game hunting, with the possible exception of roe (which I have taken with a .270 Win) or muntjac (which I have never even seen let alone hunted). Nonetheless, you can bet your 'sweet patootie' that my hackles are going to raise when some self-righteous, "ethicist", without a shred of experience, and relying solely on the vomit and sputum of an equally inexperienced gun-writer (ptooey) gets up on their high horse to tell me either that I "can't" use that arm, or that it is "unethical" to do so.

Let me be as clear as I can be here. I AM NOT ACCUSING DALUA OF BEING SUCH AN "ETHICIST". Nor am I accusing him of any such "self-righteousness".

Rather, I am trying to explain the "raison detre" for my 'enthusiasm' for the subject of terminal bullet performance, and point out WHY it does matter that there is a plausible, objective, quantifiable explanation for the consistently observed phenomenon of "instantaneous" death. A "death" that occurs not due to a strike to the CNS and WAY before "oxygen deficit" would render the quarry incapacitated.

I'll close by saying that I believe those of us left in this discussion are probably very like-minded hunters. If you showed up in my hunting camp with "your" (the editorial "you") light-for-caliber or herking-big-magnum, I would care only that you knew your arm well and were confident that you and it could get whatever the 'job at hand' was, done 'cleanly'. Of course if you showed up with a .17 Remington and we were hunting coastal brown bears, I might want to 'up my fire-power' a bit if I was going with you for the day's outing. :lol:

Paul
 
Let me just point out that my comment about bits hitting the spine related to foxes chest-shot with a light bullet from a .22-250.

I imagine a really fast light bullet such as you describe used on a largish animal would effectively mince a lot of lung as well as heart and great vessels. This might, as this company has previously discussed elsewhere, cause a very rapid drop in brain blood-pressure by opening the heart-end of the carotid arteries, or possibly as Matt458 suggested by upsetting the baroreceptors in the aortic arch. By contrast, the plain factory-loaded 100gr soft-point from the .243 I used to use would probably not be quite so effective.

The idea of oxygen deficit in the brain causing rapid collapse will be familliar to those who have had the experience of standing up of a sudden after a long rest and as a result feeling faint to the point of having to sit down again. And that is without non-recoverable thoracic trauma.

Perhaps you could describe the appearance of the chest organs in these animals? Do you get an exit wound often?

I'm always one for straightforward explanations, if these will serve, of observed phenomena, and if there is a good deal of internal chest trauma in these animals, could we not be content with that as an explanation for their sudden demise?
 
I'm always one for straightforward explanations, if these will serve, of observed phenomena, and if there is a good deal of internal chest trauma in these animals, could we not be content with that as an explanation for their sudden demise?
Absolutely as far as I'm concerned!

With regard to the "chest wounds": I would say "jelly" comes close, and "no identifiable organs" is reasonable hyperbole.

Devastating thoracic damage is what I seek in a big game bullet and what I get with these bullets when delivered with high impact velocities. But, they are not for those that are content to shoot an animal in the haunch expecting, and demanding, that the bullet "penetrate" to the chest cavity to destroy the heart and/or lungs. An animal running straight away from me is a 'safe' animal as long as they don't stop and turn sideways to look at me. A very common, and fatal, behaviour of caribou.

Whatever the mechanism of "death", these bullets are effective, humane, efficient (nominal meat damage), game getters, regardless of what the "paid experts" may say.

Paul
 
There we are then; a good reason for rapid collapse, and particularly so if the animal were not alerted in any way to the stalker's presence.

If I were to use a rifle loaded in this way, I think my only concern would be that the bullet should be strongly-built enough to get through a shoulder, in case the impact should unfortunately be there instead of behind it.

Again, though, I feel obliged to mention my feeling that the reason for the damage seen in the chests of these animals is the number of joules of energy distributed over a large area inside by bits of rib and bullet. It imagine it doesn't take much energy to make a mess of thoracic contents, and a light, fast and relatively frangible bullet introduced there clearly has, from your description, more than enough to acheive a reliable physiological kill.

The time take to distribute that energy, in my view, is not of any relevance at all as long as it is done quickly: and in this context, any projectile from a firearm may be considered to be causing damage quickly.
 
Dalua,

Only two more comments in response:

1) Spend some more "time" considering the "time" in my calculations.:lol: If you exclude the time factor, then the only comparison is "kinetic energy". When you make comparisons of the kinetic energy of "small and fast" and "big and slow" you don't get the "equality of performance" that you get with the time-related comparator - "power".

Yes, the time interval is very small. Yes, the time difference is small. That's the arithmetic. Nonetheless, it is the 'power' of the bullet that the animal has to 'overcome' to stop the bullet. It takes more power to stop a small car going fast, than it does a big car going slow - even if their speeds and masses yield equal kinetic energies - IF you have to stop the small car in less time. In the case of an animal, their flesh provides the 'power' to stop the bullet. The more 'power' their flesh has to provide, the more damage done.

2) With respect to:
I think my only concern would be that the bullet should be strongly-built enough to get through a shoulder, in case the impact should unfortunately be there instead of behind it.
This is a commonly-expressed concern, that has a foundation in "older" HPs, as well as a certain legitimacy. The reason I mentioned the specific bullets was that their design isn't what is seen very often any more. Both the 7mm 115-grain and the .308" 130-grain HPs have VERY large, OPEN meplats. If you peel the jacket off of those bullets, what you have is almost a lead cylinder - a form even Elmer Kieth could love. And that's really what THESE HPs are about. Unlike most non-HP hunting bullets, the jacket of these HPs is NOT there to improve terminal performance, it's there to improve external ballistics (as opposed to internal and terminal) meaning flight characteristics - namely ballistic coefficient. When the bullet hits, the jacket peels off very quickly, and what is left is a lead cylinder. A VERY effective terminal projectile. The only "frangible" thing about it is its jacket.

I believe it was in this thread that I mentioned that I once lost about 5 lbs of meat from a caribou using the 115-grain 7mm bullet. The instance goes directly to your concern about getting through a shoulder.

The caribou was 207 paces off, quartering towards me, moving from left-to-right. The quartering angle was severe enough that a shot 'behind the shoulder' would have likely gone quickly through the side of the chest cavity and on into the gut cavity. While it would have certainly dispatched the animal quickly, I HATE to "bust a gut". That ruins more meat than any single bullet wound will. So instead, I chose to shoot through the shoulder. The animal presented its right shoulder very 'nicely', and I chose the 'point' created by the shoulder joint as my point of aim. I was shooting a wildcat 7mm x 300 Watherby, and this bullet does just over 3500 f/s from its muzzle. It also shoots tiny little 3-shot clover-leafs at 100 yds. The bullet hit exactly where I aimed, and the caribou folded like a wet rag. When I got to taking him apart, I was seriously P.O.d because the right shoulder was a mess. The bullet had struck precisely where aimed, and the humerus, scapula and clavicle were completely demolished within 6" of the point of impact. There wasn't a piece of bone larger than one's thumbnail within a 6" radius of the entrance hole. AND, all that meat was 'hamburger'. HOWEVER, few animals I have shot that were not hit in the CNS dropped like that little bull did. The thoracic trauma was severe as well because that bullet penetrated well into the thorax and "messed things up" there too. That meat loss was the greatest, by FAR, that I have ever lost using this bullet.

I'll repeat that I am neither "hawking" these bullets or their use, nor am I trying to get anyone else to "change their modus operandi". However, I wouldn't mind changing a few misconceptions about the efficacy of FAST, light-for-caliber bullets for big game.

I should point out this isn't just about the bullet. Light-for-caliber bullets must be going "fast" to be effective. (It's a "power" issue.) Also, that large, open meplat leads to relatively poor BCs. Meaning these bullets loose that high speed muzzle velocity pretty fast, which in turn means they are range-restricted. For that particular rifle/bullet/cartridge combination, the max range a far as I'm concerned is about 300 yds. Since that's my own self-imposed "max range", this bullet/rifle/cartridge combination "works" for me. HOWEVER, that bullet doesn't "work" in my wife's 7x57 because the cartridge can't generate enough MV to make the bullet/rifle/cartridge combination be effective out to the ranges my wife can shoot caribou or sheep. Therefore, I load 140-grain spitzers for her use. Again HOWEVER, her animals, when shot "perfectly" behind the shoulder and "through the boiler-room" ALWAYS run off some distance between 50 and 100 yards. There are NO "bang-flops" or "dead-right-theres".

Finally, the modern "HP", also known as the "plastic-tipped bullet" in its various forms, has a very seriously NOT "thin" jacket. In fact, the most recent of them like the Accubond, produce through-and-through wounds almost as frequently as "partition" type bullets do. If you haven't looked at their jacket design, you might have a look. It's impressively designed - for penetration. A "hollow point" that "penetrates"... Whodathunkit?

Paul
 
Bit by bit, so...

1) Spend some more "time" considering the "time" in my calculations.:lol: If you exclude the time factor, then the only comparison is "kinetic energy".
Well, I suppose the only comparison of the potential of the bullet to harm the quarry before it hits home is kinetic energy. It is energy, work, joules appropriately conveyed to the quarry that kills.

When you make comparisons of the kinetic energy of "small and fast" and "big and slow" you don't get the "equality of performance" that you get with the time-related comparator - "power".

Now I cease to understand.

If we have a small fast bullet with the same kinetic energy before impact as a heavy slow bullet, is it not relatively straightforward to explain the difference in terminal effect in terms of the different behaviour of the bullet in the deer?

Your initial post really says it all quite early on, but the point is then swallowed up by what seems in my view to be unneccessary and mistaken overcomplication.

Your quick light bullet loses its entire 2000+ftlb mincing the thoracic contents of the deer. The big slow lumps go bumbling on through, making a fatal hole no doubt, but you can still tell one lung from the other when you unzip the beast.

It is all to to with the amount of energy (joules) put into the right part of the deer. That, in my opinion, is it. Whether the bullet minced the chest contents in 0.0003s or 0.03s will in my opinion have absolutely no bearing the outcome whatsoever, any more that the room will get hotter for having a 100kW heater running for 1 minute rather than a 1kw heater running for 100 minutes.

A final (I hope) allegory.

Let us take your light, fast motorcar and your heavy, slow vehicle, and drive both towards separate, very large establishments which retail china and glasswares.

The light, fast car breaks throught the plate-glass window showering the interior of the shop with fragments of glass, fragments of itself, and imparting to fragments of the stock enough energy to demolish further stock at some distance. By the time the cylinder-block and transmission of the vehicle come to rest against the inside of the back wall, the retailer's insurance underwriter has left the country. Car, stock, both destroyed. The energy the car had on entering the building has all been changed into broken glass, china and car.

Now, the slow, heavy vehicle approaches an uncannily similar establishment. The vehicle pushes the plate-glass through sedately and passes through the shop damaging goods on shelves immediately adjacent to its path, and perhaps on the shelves next to those too. On reaching the back wall, the vehicle, albeit a bit wider at the front that it was to start with, pushes through that also and carries on with only marginally less energy than it had when it came in.

Why do the interiors of these establishments look so different?
I suggest that it is because the light fast vehicle distributed in its collision a great deal more energy about the shop than the other vehicle. It did more work in the shop; it lost more joules to the shop.

The light fast bullet spread 2663J around inside the deer's chest. The slow, heavy one - well, we don't know, but I'd guess at a good deal less than half of that.
So why the need for a time element to the explanation?
 
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I think we are at an end to this discussion with regard to 'power'. You have made it very clear that you don't consider "power" - a force applied over time - to matter in the context of "lethality". Your commitment to the idea that kinetic energy is the sum of all that is necessary to consider when comparing the terminal performance of two types of bullets is crystal clear.

I understand, and we disagree.

That really seems to be the end of it.

With regard to your allegory, I specifically exclude from my comparisons and calculations those instances when the "big and slow" penetrate completely. There is simply no way to calculate either KE or power of a projectile that completely perforates a target be they "big and slow" or "small and fast".

I feel comfortable believing that you and I can disagree on the esoterica of the "hows and whys" of the terminal performance of bullets and still be able to greet each other cordially around a hunting campfire. Or even on this internet forum.

Cordially,
Paul
 
I read the entirety of http://www.rathcoombe.net/sci-tech/ballistics/myths.html#energy, and I must say that is was just short of nauseating. It is fraught with flat out errors as well as unadulterated arrogance. The arrogance is astounding, as the author has almost no credentials to substantiate his 'holier than thou' attitude and, his self-proclaimed "scientific analysis" is consistently flawed.

For a while as I read, I thought I would try to pick a single example that I could use to illustrate what is SO wrong with this tirade, but as I continued to read it became patently clear that to select one or two of this piece's technical errors (to say nothing of the logical ones) would invite both too-specific "rebuttal" and an assumption that whatever I chose to critique was "all" that was wrong with this treatise (more correctly labeled a "tirade of arrogance"). Almost every paragraph contains either technical or logical errors, contradictions, or violations of fundamental scientific writing that any genuine scientist would be ashamed to have associated with their name.

So, I choose not to "critique" this diatribe any more than I have above. If someone here at SD wants to select some specific element of his 'analysis' to discuss, I will offer my opinions on that specific topic in a discussion with the SD member.

I was wrong in my earlier post when I wrote " I suspect I would find much to agree on with this author..." I have next to NOTHING in common with this fellow.

Paul
 
That's very interesting. I didn't see anything wrong with it at all, really; not that my physics/mechanics is much to write home about.

However, should you wish to pick a paragraph or two and give us your opinion on it, I don't think anyone reading your opinion above would make the mistake of assuming that those were the only parts you could find fault with.
 
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