Who on earth in this day and age would hunt with a muzzle loader? What a bellend. If you're hunting* you have a responsibility to ensure a clean kill on your quarry, using antiquated weapons vastly reduces the possibility of a clean kill. Wild venison is a delight to eat, and American hunters have pretty much limitless resources of this delicious, organic and sustainable food source. Leave the muzzle loaders to museums, and exhibitions, modern and accurate hunting rifles are widely available.
*BTW, this has nothing to do with a bunch of overtly wealthy knobs standing in a field aiming shotguns at overfed, unfit, pheasants who are bred in tiny cages then released for their first ever free flight only to be met with a hail of 12 bore shot. Neither is it anything to do with scum who chase foxes on horses with packs of hounds, with the sole intention of ripping the animal apart for absolutely no viable reason other than to satisfy their disgusting lust.