stubbicatt
Member
Saw a youtube video today by a guy who was shooting an AK74SU he had built for him. When he bought it, he said it had a standard 1 in 8" twist AK74 barrel on it in 5.45x39, which had been shortened to 8" from its normal 16 or 17" length. In the video he said that the short, 8" barrel, required a 1 in 6 inch twist to properly stabilize the bullets.
I do not know, but I guess rotational velocity is proportional to linear velocity, and is a function of linear velocity. Rotational velocity as rotations/time. As projectile linear velocity increases, so too would rotations/time.
I had never considered something like this before, that the shorter barrel would require a faster twist to adequately stabilize the projectile as rotations/time rather than rotations/distance than a longer barrel with the same cartridge.
I do not know, but I guess rotational velocity is proportional to linear velocity, and is a function of linear velocity. Rotational velocity as rotations/time. As projectile linear velocity increases, so too would rotations/time.
I had never considered something like this before, that the shorter barrel would require a faster twist to adequately stabilize the projectile as rotations/time rather than rotations/distance than a longer barrel with the same cartridge.