I am new at muzzleloading myself and have done the trial and error load development for my gun. I am currently shooting 130 gr Pyrodex with a 250 gr Barnes Expander MZ. I am consistently shooting 1" groups at 125 yards and 2" at 200 yards. I am dead on at 125 yards and 13" low at 200 yards. The reason that I got started in muzzleloading is the easy of inline rifles. I am shooting a 50 cal Knight Disc rifle topped with a Zeiss Conquest 4.5-14 scope.