My book lists 7 drams (1 dram = 27.34 grains) and 2 ounces of shot. Also note your chamber length, it could be 3", 3 1/8" or 3 1/4" in an eight bore. So wads must be stacked to match your gun. I'd recommend 1 fg or 1 1/2 fg Goex or the same with Swiss if you want more power.