Ok, some of you math geniuses help me out here. I've hear often enough from a number of shooters that a shorter barrel time (shorter barrel) gives noticeable better results on barrel movement. I been trying to quantify that and am not able to. Here's my thinking:
Using a 17 inch barrel vs a 29 inch barrel (just happens to be one foot :
) I do use a 29 inch barrel by the way.
By 17 inches the bullet should be near maxed out around 1080 fps for average standard velocity target ammo. It will loose a bit to the muzzle of the 29 inch barrel, but lets just say its 1080 fps also for sake of argument. Should be close. That means the additional barrel time is about .0009 seconds. Not a whole heck of a lot. I think trigger time is more than that! Anyhow if the muzzle of the 29 inch barrel is moving 12 inches per second, the additional movement of a 29 inch barrel over a 17 inch barrel. .0009/12 = .000075 inches. That translates to .005 on target at 50 yards. Where have I gone wrong? Perhaps I am assuming the muzzle is moving to slow. Yea, I just grabbed that 12 inches per second out of the air thinking the real number would be less and that I was figuring worse case. Rich
Using a 17 inch barrel vs a 29 inch barrel (just happens to be one foot :

By 17 inches the bullet should be near maxed out around 1080 fps for average standard velocity target ammo. It will loose a bit to the muzzle of the 29 inch barrel, but lets just say its 1080 fps also for sake of argument. Should be close. That means the additional barrel time is about .0009 seconds. Not a whole heck of a lot. I think trigger time is more than that! Anyhow if the muzzle of the 29 inch barrel is moving 12 inches per second, the additional movement of a 29 inch barrel over a 17 inch barrel. .0009/12 = .000075 inches. That translates to .005 on target at 50 yards. Where have I gone wrong? Perhaps I am assuming the muzzle is moving to slow. Yea, I just grabbed that 12 inches per second out of the air thinking the real number would be less and that I was figuring worse case. Rich