A "group" is not really an issue when deer hunting with a muzzleloader since you will only have one shot. If you can sit down and put your first shot in the "middle" of the kill zone at 100 yards, then go hunting.

I personally am not happy with over a 1" group at 100 yards which I can do with both my Knights (Extreme and Elite) and my BP Xpress. In my Knights, I shoot 130 gr Pyrodex and 250 gr Barnes Expander and in the BP Xpress 200 gr Pyrodex and 300 gr Hornady SST. As I said before, this is probably overkill for hunting situations, but I have fun at the range trying to make it happen.