was my boys first muzzler loader i got for him for along time we shot 90grains of black powder under a 370grain maxi ball then went to sabots he dosnt use it much anymore so dad does love it i now shoot a 400grain smooth paper patched bullet in it with 90 grains of black powder about 2in groups at 100 yards the gun will shoot about anything that you put in it evan a round ball with 70grains of powder