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If a powder gives low velocities relative to the same volume of other powders does that mean the pressures are lower?
Yes I think perhaps "severely equal" would be the key...,The question could obviously only apply with all else being equal except the powder itself.
And even at that, I suspect that a fine enough granulation could indeed drive up pressures without a definable increase in velocity when the barrel is long enough. I say long enough because if the barrel is short enough a spread in velocities will be obvious.
Yes, "if the powder gives low velocities". You've assumed the answer.If a powder gives low velocities relative to the same volume of other powders does that mean the pressures are lower?
yes.If a powder is low enough in quality then it would burn more slowly.
It could but only under certain circumstances. and that is not likely.Being a slower burning powder it could give the bullet a higher exit velocity in a longer barrel...
Perhaps Jacks Battle versus Goex FFg and FFFg and a 400 to 450 grain bullet in the .458 bore, finding out how much of each powder gave the same velocity.
I think about increased charges and diminishing returns. 30 grains in a .44 colt design gun produces velocity in the 800fps range, and loads easy. At forty grains you may not be able to compress it enough to seat the ball, but you don’t increase the velocity.yes.
It could but only under certain circumstances. and that is not likely.
Are you sure your test fits your question and vice versa ?
I think about increased charges and diminishing returns. 30 grains in a .44 colt design gun produces velocity in the 800fps range, and loads easy. At forty grains you may not be able to compress it enough to seat the ball, but you don’t increase the velocity.
Overload a rifle will give you lower velocities but higher pressure. I think you would have to do some hard science testing to get a real answer
Yes you can get varied velocities and energies changing brands. What I was referring to in this case was a point where increasing the charge would not increase the velocity. In Lyman’s test large charges could slow velocities even while increased breech pressures.
Yes you can get varied velocities and energies changing brands. What I was referring to in this case was a point where increasing the charge would not increase the velocity. In Lyman’s test large charges could slow velocities even while increased breech pressures.
Lyman testing shooting a 34 grain GO 3 f got avg of 953 lup of 7240, increased to 37 that was max fps was 960 but 7420 lup.
The increase produced 7 FPS,
At 31 grains avg velocity was 859, but 28 grains produced 882. Lup for 28 grains was 6320, while for 31 lup was 6500. Velocity went down while increasing lup.
The 25 grain charge was 868, that was faster then the 34 grain charge 859.
This was in a .44 8” barrel.
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