January 26th, 2017, 02:18 PM
Join Date: Aug 2009
Originally Posted by DstRflMn645
My understanding (and backed up by APG) is that rotational velocity and linear velocity are not linked. The rotational spin will slow somewhat once you get out past 1000 meters, but it is a very minor amount. So if you start a bullet out in a 1-12" twist barrel, it will rotate once every 12" of linear flight regardless of velocity.
They are not directly linked but are two components of a bullet's physical performance from "internal" to "terminal" ballistics.
Both linear and rotational velocities diminish with distance from the muzzle, primarily due to atmospheric resistance (air density). Rotational velocity comes into play as it being a factor in the vertical component of wind drift.
Last edited by DudleyDR; January 26th, 2017 at 02:34 PM.