ORIGINAL: Tahquamenon
Butch's Bore Shine ...is an exceptional product. I've been using it for several years. They also have a "Black Powder" version that I have not messed with.
FWIW I prefer the "Blackpowder" version of Butch's Bore Shine on my muzzleloaders. It really cleans them fast!
That said, I'm more partial to the hot soapy water method, but will use the BP Butch's periodically.