I'll guess 80 grains of Pyrodex RS and a 300 grain CVA Buckslayer bullet. After that I would guess 75 grains of Pyrodex RS and a 385 grain Great Plains Hollow Point. Also you might get some good accuracy out of the 245 grain Powerbelt HP with 85 grains of Triple Se7en.

Keep us posted as to what loads worked. In reality of course, only your rifle knows for sure. Be sure and swab good between shoots to keep all things equal..

Good luck with your rifle...