Originally Posted By: Winny FanIf you shoot a bullet in a 9" twist barrel at, say 2800 FPS, the bullet spins one revolution in 9" of distance. Is that correct?
So, if you shoot the same bullet in the same rifle, but the velocity is increased to 3000 FPS, does the bullet spin faster than one revolution in 9" of distance like it did at 2800 FPS?
Nope, still only one full turn in 9"
It just covers the 9" quicker, therefore more RPM's.
Twist rate is the ratio of turns to horizontal distance traveled. RPM is turns over time.