In my .54 caliber Mountain Stalker which is the same as your Bobcat but sold through Bass Pro, I discovered it likes the heavier charges. I shoot 80 grains of Triple Se7en 2f, a wad, and a patched roundball. If you factor in the 15% difference in powder I am shooting an equivalent of about 90 grains of Pyrodex RS. The .54 caliber does accept more powder then the .50 caliber through. This load blows through deer with ease.