I use #9 to get the easy carbon out. Patch out to get the copper and a couple of years ago I got some Marvel Mystery Oil penetrating oil in a spray bottle. It's no longer sold but looking it up on the MSDS reports it's got the same stuff in it as the Marvel Mystery oil you put in your car's gas tank or engine. I put it on a patch and run it through the barrel until the barrel is nice and damp. I let it set for a couple of days and I push a patch wrapped around an old brush through the barrel and I get more carbon. I run the patches until they come out clean and oil free. My bore scope is telling me that at least 99% of the carbon is gone. I shoot a couple of rounds through the gun before I shoot for groups to re-season the barrel.

kwg

For liberals and anarchists, power and control is opium, selling envy is the fastest and easiest way to get it. TRR. American conservative. Never trust a white liberal. Malcom X Current NRA member.