To be certain I would have to go back and see what I Used, but as I recall it was 3.2 grains of Hodgdon clays. That was getting me 760 to 780 FPS from the evil roy. The revolver doesn't care how short I load those bullets but for the lever gun to feed correctly I have to make them as long as a typical 357 Magnum cartridge. The nose shape doesn't seem to matter too much on this gun but it wants the overall length and the weight of the bullet to be correct. It's supposed to shoot 158 grain but the ones I cast average 154 grains.