Well everyone has their tried and tru method, but I have been using Tidy Bowl toilet cleaner, a small amount in some water, just enought to tint the water light blue, usually an old laundry detergent jug, dump all my brass in it after I manually decap them(to start the cleaning process). Then run a few wet patches with the stuff thru the barrel, some vigorous brushing followed by some more patches, until they come clean, the patches are made white for a reason right? Then oil and wipe down until next time. Be sure to clean everything, breech, frame where the fring pin is and the end of the barrel and front sight. Black powder residue travels in my experience.
Just like a muzzleloader sooner is better and easier.
Oh , and dump the brass water somewhere outdoors, if youre using real black powder, the sulfur smell is strong. My wife doesnt particularly care for it.
Just my $0.02 here of course.
Pete