How do you clean black powder cap-and-ball revolvers?
Those old-school revolvers using corrosive black powder need special care. YouTuber mark3smle demonstrates how he cleans his cap-and-ball revolvers.
Regular gun solvents made for smokeless powders will not cut the corrosive gunk that black powder creates. Your best friend is hot water and a scrub brush. After your thorough cleaning is complete, inside and out of all the nooks and crannies, hit that weapon with a good coating of oil to prevent rust.