Bear - HOT water and soap followed by a HOT water rinse is IMO the best way to clean a black powder rifle. Just the barrel now, not the whole gun. After my sidelocks are scrubbed with the soapy water I put a funnel in the business end and pour very hot water down the bore to rinse it out. The Barrel gets hot enough that you cannot pick it up with your bare hand. It drys fast after running one or two dry patches through it. Just as a precaution, I then run a few patches of #13 through it, dry the bore again and then coat the bore with the bore butter.