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Southla1 · July 16, 2000, 03:35 PM

According to some of my older manuals and the internal ballistics sections they do not. The reason I am saying this is that some actualy start to decelerate in the barrel due to bullet friction over coming the expansion of the gases. This is using too slow a burning powder of just the makeup of the round. If I am not mistaken with a .22 LR the optimum barrel length is 16 or 17 inches. I can see no way one can accelerate with not gases behind them to help "shove" plus air resistance is acting on the bullet BEFORE it leaves the barrel. I do know this if a bullet is chronographed at 5 feet (this is too close with some large capicity cases) the 10 feet then 15 feet etc. it is slower the farther you get from the muzzle. I have done this with a .22 so if it is accelerating it is doing it in the first 5 feet because after that is is slower and slower etc.

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Carlyle Hebert

[This message has been edited by Southla1 (edited July 16, 2000).]

July 16, 2000, 03:35 PM	#2
Southla1 Member In Memoriam Join Date: March 19, 2000 Location: Jeanerette, La. Near the Posts: 1,999	According to some of my older manuals and the internal ballistics sections they do not. The reason I am saying this is that some actualy start to decelerate in the barrel due to bullet friction over coming the expansion of the gases. This is using too slow a burning powder of just the makeup of the round. If I am not mistaken with a .22 LR the optimum barrel length is 16 or 17 inches. I can see no way one can accelerate with not gases behind them to help "shove" plus air resistance is acting on the bullet BEFORE it leaves the barrel. I do know this if a bullet is chronographed at 5 feet (this is too close with some large capicity cases) the 10 feet then 15 feet etc. it is slower the farther you get from the muzzle. I have done this with a .22 so if it is accelerating it is doing it in the first 5 feet because after that is is slower and slower etc. ------------------ Carlyle Hebert [This message has been edited by Southla1 (edited July 16, 2000).]