I think 110 grains is a max load. In my .58I have shot 110 grains of Goex 2f and the down range power is very impressive. Of course shooting a 284 grain round ball does not hurt. That's a big chunk of lead with a lot of power. Actually the .54 caliber I have been told is the best roundball caliber for hunting out there. I like that personal caliber and they seem to do a number on anything they hit...