What bullet are you using. I have to load up 150 ABLR's in 7mm08 shortly so might well be interested in your results.
RS62 Burn Rate
- Thread starter NigelM
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What bullet are you using. I have to load up 150 ABLR's in 7mm08 shortly so might well be interested in your results.
The deer man
Well-Known Member
I've been developing with Sierra 160gr TMK and Hornady ELD-M using R15, RS62 and RS60 out of a 22", 1:8 twist, Proof Research barrel.
After determining the COL for these bullets to my rifle I've found;
R15 giving around 2,520 fps with both bullet types,
RS62 around 2,485 fps with Sierra and 2,520 with Hornady,
RS60 around 2,650 to 2,700 fps with both bullet types.
In order of accuracy with best two groups for each powder at 100 yards respectively;
R15 / 9mm & 10mm - Hornady & Sierra. Positive I can replicate these and improve.
RS62 / 11mm & 14mm - both with Sierra. Suspect I can improve the Hornady to the Sierra.
RS60 / 22mm & 24mm - Hornady & Sierra, a little more playing might improve this powder/accuracy, speed is good.
All these loads are supposedly supersonic and not overloaded and hot. The minimum load/speed being RS62 is supersonic at 1,225 yards/ 1,120 metres. My aim was 1,100m so I'm there but...we'll see!
Are the velocities you quote for each powder the point at which you start to see pressure signs, or a tad below, or are they book max loads?
Not surprised that RS62 is the slowest, but it is a true single base powder with a heat of burn well below the other two so will be much kinder to your barrel.
I have been running RS60 with the 150 ABLR at 2760 FPS and should get the same with RS62 in theory. Fingers crossed.
For LR I use a 6.5x47 Lapua and am switching from 123 Scenars which just about make it to 1000 meters to the 150 Sierra Match King which should see me out to 1300 meters before going transonic.
Busy summer of load development!
The deer man
Well-Known Member
These velocities are not book max (nowhere near) and there are no pressure signs even when using Federal 210M primers (quite soft). The R15 is probably the warmest load of all of them but nice clean case necks and no outward signs of pressure. I try and keep the R15 and RS60 pressures low and that's where I'm going next with the RS60, around 2,600 fps +.
I'm now just interested in accuracy as have the bechmark for the lowest speed and build from there. I suppose I could have stretched the range of this calibre a lot further with a longer barrel but 22" seems a happy medium, nearly went 20" but think I might have been really stretching it to meet my 1200m criteria.
I'm now just interested in accuracy as have the bechmark for the lowest speed and build from there. I suppose I could have stretched the range of this calibre a lot further with a longer barrel but 22" seems a happy medium, nearly went 20" but think I might have been really stretching it to meet my 1200m criteria.
The deer man
Well-Known Member
Those Nosler 150gr ABLR look interesting???
Very effective. They have been well tested this winter on Red, Roe, Muntjac and Sika. Red and Sika 150 to 350 meters killed very effectively. A bit too hard on Roe and Muntjac but then all the shots were inside 100m. Overall about 35 deer shot between October and April and very pleased with them.
ChesterP
Well-Known Member
Sorry, late to the party...is it still on?....any beer left?
Having read through this thread I can say with some conviction that I trust what Nigel (plus Dodgy and Edinburgh Rifles et al) says because he (and they) happens to know what he's talking about and clearly he and the others were not out for a bun fight but to share info and data, before someone entered the ring spoiling for a fight
There tends to be mutual respect on here between those who've demonstrated a little knowledge and experience and done so in a gentlemanly manner, so please don't feel offended if we sometimes get a bit abrupt when the BS meter comes out to play...
And on the subject of BS....are you seriously suggesting that a rifle that can stabilise a bullet at the muzzle...well, let me get this straight...that bullet will be fine at 100 but somehow be all over the shop with a poor stability factor by 600? Sorry, but I think you need to read a little more on applied ballistics because unless a bullet is transonic by 600, if it's stable at the muzzle, it sure as hell will be stable at 100, 200....all the way past 600 providing it is above transonic. To suggest otherwise is erroneous. Stability is all about the BC/length/form having enough twist applied to gyroscopically stabilise a projectile and the stabilisation spin is more than enough to keep things on keel until transonic where the coefficient of drag rises towards Mach before plummeting below it as velocity is shed. Some bullets, like the 30 cal smk190 will stay stable through the transonic region and are a good'un to use for 1000yd in .308 for that reason, especially where the velocities can't be upped enough with shorter barrels and loads. I think you've just embarrassed yourself by what you've said. It's spelled "doubt" by the way. "Dowt" according to the Collins English dictionary, is colloquial Scottish for a cigarette butt.
Slickshot
Well-Known Member
Sorry, late to the party...is it still on?....any beer left?
Having read through this thread I can say with some conviction that I trust what Nigel (plus Dodgy and Edinburgh Rifles et al) says because he (and they) happens to know what he's talking about and clearly he and the others were not out for a bun fight but to share info and data, before someone entered the ring spoiling for a fight
There tends to be mutual respect on here between those who've demonstrated a little knowledge and experience and done so in a gentlemanly manner, so please don't feel offended if we sometimes get a bit abrupt when the BS meter comes out to play...
And on the subject of BS....are you seriously suggesting that a rifle that can stabilise a bullet at the muzzle...well, let me get this straight...that bullet will be fine at 100 but somehow be all over the shop with a poor stability factor by 600? Sorry, but I think you need to read a little more on applied ballistics because unless a bullet is transonic by 600, if it's stable at the muzzle, it sure as hell will be stable at 100, 200....all the way past 600 providing it is above transonic. To suggest otherwise is erroneous. Stability is all about the BC/length/form having enough twist applied to gyroscopically stabilise a projectile and the stabilisation spin is more than enough to keep things on keel until transonic where the coefficient of drag rises towards Mach before plummeting below it as velocity is shed. Some bullets, like the 30 cal smk190 will stay stable through the transonic region and are a good'un to use for 1000yd in .308 for that reason, especially where the velocities can't be upped enough with shorter barrels and loads. I think you've just embarrassed yourself by what you've said. It's spelled "doubt" by the way. "Dowt" according to the Collins English dictionary, is colloquial Scottish for a cigarette butt.
Gezz your boring! Clueless too.. anyways off out got some 1/2 mile foxes to knock over
Tom D
Well-Known Member
Going to have to clear my history now!
ChesterP
Well-Known Member
Name calling such as "boring and clueless" is the last resort of the ignorant...in the true sense of the word. My name isn't "Gezz" by the way. I'd pitch my own knowledge against yours any day of the week sunshine. You've been caught out on several different threads spouting rubbish and generally behaving like a spoiled troll. Carry on though as it provides us a little amusement and lightens the mood
What did you think to dodgy's present? Very generous of him I thought
Slickshot
Well-Known Member
Name calling such as "boring and clueless" is the last resort of the ignorant...in the true sense of the word. My name isn't "Gezz" by the way. I'd pitch my own knowledge against yours any day of the week sunshine. You've been caught out on several different threads spouting rubbish and generally behaving like a spoiled troll. Carry on though as it provides us a little amusement and lightens the mood
Mate I’ve forget more than you know!
ChesterP
Well-Known Member
Slickshot
Well-Known Member
You means trolls
Slickshot
Well-Known Member
So was I.. “Trolls” lol
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