This seems to be a pretty good deal these days if you're looking to get a taste of black powder.
https://www.emf-company.com/store/pc/1851-Navy-Brass-44-7-1-2-w-Extra-44-Cylinder-110p2308.htm
https://www.emf-company.com/store/pc/1851-Navy-Brass-44-7-1-2-w-Extra-44-Cylinder-110p2308.htm