I want to push some .243 projectiles FAST (as in 4300+ FPS, in my 1-in-10 twist barrel, that's 309,600 RPM!)
What's the best jacket material for this kind of speed? Or, am I just screwed? Is it the velocity or the rotational speed (RPM) that causes jacketed projectile disintegration?
I might be in the market for a slower-twist barrel. What's the RPM limit of a copper- or brass-jacketed bullet?
Thanks!
jkpq45