I have a brick of CCI Small Magnum Primers and my Question is: Can I use the Small Pistol Magnum Primers in a rifle cartridge? I was thinking that when I get around to loading my 30 Carbine rounds, can I use the small pistol magnum primers in the 30 carbine rounds? I have another beginner question, I de-primed some 40 S&W ammo about 5 years ago and now they seem to have a little corrosion on them, is it OK to media (crushed walnut media) clean them just to get the tarnish off? Thanks, Just beginner questions if you don't mind!! 74man!!