Tim Pilbeam Copper Bullet Test Data

Many thanks for your PM Nigel

The time taken to collate this data is admirable & interesting and it's great to see people trying to better interpret it.

Ultimately lead and lead free bullets can do weird and wonderful things, turn on a rib, give up energy quickly and not exit one day and pencil through the next.

A frangible V-max generally behaves very differently (the vast majority of the time) to a bonded bullet such as an accubond, the same can be said of copper a TTSX behaves differently to the more frangible lead free bullets.

I've shot somewhere between 60-80 beasts with lead free and a few 100 with lead, many friends and colleagues have shot well over 1000 each lead free.

In our experience there is a clear correlation with pencilling with some (most) lead free designs, especially when you are lucky/ unlucky enough to enter the chest between ribs without clipping shoulder cartilage / bone or rib bone. Even when bonded bullets do this they still tend to expand reliably in my experience and have recovered quite a few from red and fallow shot at 300m+ (the Nielsen is the one notable exception)

The other correlation is turning in the body, specifically Barnes.

The final thing little mentioned on here is head shooting with lead free. Those that may head shoot frequently in parks will generally opt for a highly frangible light bullet and may not want it to go super fast as reduced recoil can allow you to quickly dispatch several from the herd as quickly as possible. Most people that work in parks are sensible enough to stay off this forum, or at least not comment. There is no doubt that the less frangible lead free bullets have been known to clip the skull and result in a highly mobile injured deer where as a frangible lead bullet would have resulted in a dead deer. 2 people have also told me that they have found the more reliably expanding nielsons can inure other deer in the herd when head shooting with the petals & base ending up in other animals where a frangible lead bullet would have disintegrated into tiny fragments as it clipped the skull.

I think that we will learn allot more about preferences of lead free bullets as more and more people use them. Just like lead their designs will be marmite depending on your application & preference.

This data set is very small, and if you consider averages a few that dropped on the spot would hide the bigger picture of a few doing 100m or more.

One of my best stalking mates is home loading fox 30cal bullets and the first roe he shot slipped between the ribs, did 300m, led up in a hedge and was dispatched with a head shot a short while later. The next 10 have dropped within 3m. These type of runners might only be 1 in 100 but with an SST. As it goes he'd rather have the odd one run than mash up a carcass with SST's! Each to their own.

My hound is voting for solids followed by ttsx ;) but he's not teh most ethical of stalkers lol

I've taken 46 deer with the Nielson 6.5 120gr at 2900fps (ish), 6 neck shot the other 40 chest from MJK to Fallow and none have made it 30m (yet) with most falling within 5m. Meat damage is minimal akin to that of the bonded lead bullets I used to use. I am yet to puncture the gut despite taking one MJK facing almost strait at me through the chest (quartering ever so slightly)

I stopped using barnes TTSX after the first few animals, they do seem to like to be going fast to expand reliably resulting in massive blood run / bruising and then still pencil through too often for my liking, foxes in particular seem to run and run where even a bonded bullet would see them do 50-80m max in my experience.

For chest shooting UK deer I couldn't recommend the nielson's highly enough and for head shooting park deer or people that want something more frangible Yew tree bullets would be my recommendation the tips break up lovely and they do not need to be pushed too fast. And as soon as they are available in 6.5 (currently 6mm only) I will try the Yew tree out for at least 50 chest shot beasts but is suspect the damage to shoulders may be more than I personally like which will be a bonus to others.

Sadly neither of my recommendations are in factory, this appears to be the biggest problem IMO with lead free, factory choice is limited and may not run well in your rifle or deliver the terminal ballistics you desire
 
Does anyone have a link to the FULL data set? not the averages?

Knowing how many were head & neck shot in this study I'm a tad concerned that if these are mean averages as opposed to median we are missing the full picture.
What full picture do you want I was one of the testers ?
 
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What full picture do you want I was one of the testers ?

The shot distance, ammo type, shot placement, distance ran etc of every deer, The full data set.

Fantastic project, a great start to better understanding the application of factory offerings on UK species. Transparency might help people make their decisions and / or quieten any naysayers, or not lol
 
Personally I think the pencilling straight through is a bullet speed issue.

I won’t bore you with a repeat of my experience, but it’s only happened to me 3 times with 3 bullets from the same batch.

I don’t drop a weight and I don’t drive them fast, right or wrongly and I don’t have problems with pencilling.

I can only speak with regards to factory ammunition with the fox and I’ve had no issues what so ever with the 150 or so animals I’ve shot, but that is a 130gn and 130gn in the 270 win is the all round perfect bullet weight.

but a can not prove what I think as I’m a firm believer in if it ain’t broke do t fix it! But I just read people’s experiences and compare them to mine and most who load copper or not lead drive them at light speed and a weight lower than they normally would.

Just my quids worth
 
The shot distance, ammo type, shot placement, distance ran etc of every deer, The full data set.

Fantastic project, a great start to better understanding the application of factory offerings on UK species. Transparency might help people make their decisions and / or quieten any naysayers, or not lol

Does anybody have links to a similar data set of the efficacy of lead core ammunition factory offerings to compare?

I always wondered how other people made an informed ammunition choice....other than what happened to be on their local RFD's shelves, or what their mate used!

Alan
 
It all looks promising for sure!
Now if we can get them down to the same cost as lead bullets that would be great!
 
Just about to run of my US supply :(

I have noticed a bit of variation in the price recently though between £45-60. I wonder if the lower price is old stock and the higher price is the new normal.
Possibly?

I bought 200, 130gn ttsx for the 270 from reloading solutions @ £45.50 a box at that price I would have had a 1000 If they had any more in stock.

God bless the good old cliffs gunsmithing days 😢 where you could order bullets from Utah and get them delivered quicker than the RFD could get them In.
 
Does anybody have links to a similar data set of the efficacy of lead core ammunition factory offerings to compare?
NigelM was running an impressive Bang Flop survey a couple of years back, with very rigourous data requirments.
Nigel: did you get enough datapoints to come up with clear conclusions? And what was the split between Lead and non-lead animals taken?
 
NigelM was running an impressive Bang Flop survey a couple of years back, with very rigourous data requirments.
Nigel: did you get enough datapoints to come up with clear conclusions? And what was the split between Lead and non-lead animals taken?
I think we got to about 300 chest shot animals shot IIRC. At the outset I was trying to show one way or another whether a bullet with a TV over 2800 fps would reliably kill a deer by hydraulic shock. There was a mix of lead and copper bullets across a range of weights. Lots of data collected but no solid conclusions could be drawn from it. It didn't prove the hydraulic shock theory but suggested that 3000 fps put them on the ground more quickly than sub 3000 fps.

One of the problems was too many variables. When an animal did "bang flop" was it the TV, was it the TE, was it the weight or calibre employed? Results were inconsistent to the point where you could believe the theory that if you hit them when the heart is full they fall over, hit them when the heart is empty they run.

Happy to share that data by email if anyone is interested in it.
 
I've gone back over the Bang Flop study we did a few years back. 346 chest shot deer. The data is all from SD members, all of whom are active. Here's a summary of all that data for anyone who's interested.

Firstly by terminal velocity - the original objective of the study. As you can see, Bang Flop % is very flat until 3000+ fps and then there is no spectacular increase. My conclusion was that velocity alone doesn't cause a spectacular BF reaction to the shot but it does reduce distance run.

By TV
Data PointsAv Bullet WeightAv RangeAv TVAv TEBangFlop %Av Dist Run
3000+37110943100235649%11
2800-2999110122882871221939%29
2600-27991021271282695204937%31
2400-2599711361392504190142%38
2200-2399211411922328169538%35
sub 220051601302069152820%90

I have just analysed the data again for the the subject matter at hand, Copper bullets. They were only 46 out of the 346 but the results are interesting. This suggests that copper perform better than lead. Not enough data points to really draw a solid conclusion, but I think you could conclude it's no worse than lead at normal stalking ranges. Similar to Tim's conclusions.

Data PointsAv Bullet WeightAv RangeAv TVAv TEBangFlop %Av Dist Run
Copper46131962823230770%19
Bonded451111202921207538%26
Frangible1731291212710210632%36
Highly Frangible81001092871182013%38
Soft nose741311222558189245%29
 
I know ive been quoted this before, just not much insentive to change to copper or brass when they are over twice the price!👍
The big economic incentive/advantage of mono metal lead free is the value of less discarded/metal contaminated meat...easily outweighs the cost of the round let alone any difference between lead core or lead free, even if you can use PPU.
I know ive been quoted this before, just not much insentive to change to copper or brass when they are over twice the price!👍
This goes around and around but it does depend on which lead core bullets or factory rounds you compare them to...

Alan


Screenshot 2020-10-23 at 17.09.12.webp

Screenshot 2020-10-23 at 18.30.50.webp
 
The big economic incentive/advantage of mono metal lead free is the value of less discarded/metal contaminated meat...easily outweighs the cost of the round let alone any difference between lead core or lead free, even if you can use PPU.

This goes around and around but it does depend on which lead core bullets or factory rounds you compare them to...

Alan


View attachment 202858

View attachment 202857
Which site is that please, Alan? Their .30cal/150gn e-tips are very cheap (have just paid full price). Will pre-order some more if the site lets me.
 
Which site is that please, Alan? Their .30cal/150gn e-tips are very cheap (have just paid full price). Will pre-order some more if the site lets me.
Dauntsey guns. I did those screen grabs in October last year by the look of the image titles...must be when the lead-free cost issue came up before...

Alan

Looks like they only have the 180gr in stock today....
Screenshot 2021-04-20 at 17.50.34.png
 
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The big economic incentive/advantage of mono metal lead free is the value of less discarded/metal contaminated meat...easily outweighs the cost of the round let alone any difference between lead core or lead free, even if you can use PPU.

This goes around and around but it does depend on which lead core bullets or factory rounds you compare them to...

Alan


View attachment 202858

View attachment 202857I’ve said all along copper is no more expensive then premium lead bullets.
Exactly!
 
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