100 grains of Pyrodex RS loose, .430 diameter .44 caliber 300 grain XTP in a green Harvester Crushed Rib sabot..

100 grains Pyrodex P. 458 Speer HP .454 caliber in a MMP orange sabot.

I have only had mine to the range about six times and it shoots about anything I want to shove down it. Also with a 250 gr Shockwave and 100 grains of powder it does a real good job.

Pay attention to the allen bolts on the botton. The whole they come out of they need to go back into. Also if you take the firing pin apart to clean it, be careful that it goes back in exactly the way it came out, or it will misfire.