Same as any sidelock muzzleloader. Each and every one is different. I'm assuming its a 50 caliber. So whether you're going to shoot round balls, full bore conicals or saboted bullets you're going to have to play with it using FFg or FFFg powder. Start with 80 grains and work your way up to 100. You can use Pyrodex or Triple 7 if its a percussion. Or even Alliant Black MZ. I haven't found a front stuffer that wouldn't shoot something in that powder charge range well.