I have been known to use two parts, Montana Extreme Rimfire cleaner, and one part Kroll Oil, with just a dash of Lead Out thrown in for good measure. I have had it pounded into me, the lead where the wax ring builds up is a must, to keep clean!!!!!! A min. of ten passes with a wet, brass brush, aggressively applied, using a 6 inch one piece rod in the chamber area only, between matches, along with the full barrel last. And above all else, never pull the trigger on a empty chamber, that is what they make dummy rounds for.