Use enough grease and cleaning black powder foulsing is easy with hot water.
It's messy when you shoot it, yes. It makes cleaning so much easier, though.
If you can't clean a c&b revolver in 30 minutes or less with a bucket of hot water, a bore brush, some pipe cleaners and an expendable t-shirt ..... maybe you have other issues ..... ADD, maybe?
TheGolden Rule of Tool Use: "If you don't know what you are doing, DON'T."