I tried it in a 32/40 with 205gr. lead bullet.....vel.very low, around 1100fps, press. actually quite high(26K)(according to Hogdon) accuracy quite good though, needs further work, watch the price of this stuff, some places charging $29.00 for a full size can, but it only has 9 ounces! A can should last awhile though. I think the end result in alot of rifle cal. will be not enough vel. /too high press. It certainly fills the case well with low charge weights, jury is still out on this powder in rifle cals. Its a natural in the .45 Colt.