Cool.. you can have bullets that can't be traced!!
.51 caliber roundballs.
I can also make minieballs for our 1850 style Enfield repro rifle.
I have a gun safe filled with single shot assault guns, and a few bayonets. Dates from the 1830s through the 1880s. Most of them real period pieces, not repros. We don't shoot those, but they do work. We also have about 6 shotguns and a couple of hunting rifles, and we have two flintlock rifles that are repros in styles from the late 1700s.
Only problem with black powder muzzleloaders is you have to be sure to clean them right away if you use them...