Hmm, I tend to use what is supposed to be used. Rifle primers are slightly hotter than pistol primers, they also have slightly thicker cups. If you work your loads up & the gun fires, then you can use them, but not advised. For rifles, if you shoot a semiauto, you don't need the mil spec primer (CCI#41), but they will help prevent a slam fire. Just stay away from Fed in semiautos & you should be fine.
"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".
Last edited by fredj338; 12-12-2010 at 02:05..