06-25-2013, 11:12 PM
JASmith Wrote:The velocity starts to matter when the twist is slow enough that the bullet becomes marginally stable.
The shorter barrels yield slower muzzle velocities for the same ammunition.
That might be why it looks like Alexander Arms uses a slightly faster twist for their shorter barrels.
True - I should have stated that the RPM is what stabilizes the bullet, but was trying to keep the discussion fairly simple. Forgive me for oversimplifying it.
David
"A problem thoroughly understood is always fairly simple. Found your opinions on facts, not prejudices. We know too many things that are not true."
Charles F. Kettering