Home Forums Hunting & Shooting Handguns What powder for 10mm?

Though I don't even own a 10mm anymore (eventually went in the 45 Super direction), in the 90s I did a lot of work with the 10mm and full power loads. I've used all of the powders you listed and AA#9 is the best of those for highest velocity. But THE BEST powder I ever found in terms of maximum velocity at reasonable pressures was 800X. At the time, Mike McNett and I were exchanging a lot of information on 10mm loading over at GlockTalk. A little later he quit his job and started DoubleTap ammo (I think in his garage?) with a full house 200 grain 10mm load. I don't know for sure, but I think he probably started DoubleTap with that 800X load.