Yeah, I find it funny how much people today worry about the minutia of EVERYTHING. Back in 1971, the only things I bought were the .45 caliber flintlock longrifle, flints, black powder, a 0.445" scissors mold, an adjustable brass volume powder measure, and a raw cow's horn to make a powder horn from. I already had a 25 pound bag of 0.456" lead buckshot purchased for a 1860 Colt Army revolver. Everything else got made from scratch, because I was poor, and couldn't afford to buy everything from the DGW catalog. I was already doing leatherwork, so I had scrap leather laying around. I didn't care, or know about historical correctness. I just made things to please me.
The rifle was capable of quarter size groups at 100 yards off the bench. Offhand, I could manage 4"-5" at 100 yards with open sights, and Coke bottle glasses (18 years old). I stumbled upon a load combo early on that allowed me to shoot consecutive shots without needing to swab the bore between shots. Serendipity, or GOD looking out for a kid that had no mentors.