I scrubbed a severely abused Model 700 ADL Remington, a .243, that looked as though it had a badly worn throat, but I figured I'd clean it before giving up on the barrel. This rifle looked like it'd been rolling around the bed of a pickup on the desert. Trigger was full of fine dirt, and was nearly non-functional. I completely disassembled the rifle. Completely... I started out running a heavily soaked patch through with Kroil, letting it sit for about a half hour, then swabbed that out, and gave it a good soak with a heavy coat of Sweet's 7.62. Nasty patches that never did come clean, so I swabbed it out with No. 9, then dry patches, and made a tight fitting patch and JB'd the barrel. Still a bunch o' crud, so I 7.62'd the thing again, and repeated the JB's after, then, used a new, tight fitting bronze brush with Hoppe's for about ten strokes, then patches. The bore ended up looking like it'd never been fired, it was that nasty to start with. I was rewarded a couple weekends ago with groups of 1/4 to 3/8's of an inch at a hundred yards with 100 gr. Hornady BTSPs and 4350.
There are times when I've gone as far as making a patch from the lead remover rags, the yellow, impregnated things, and running that through, but some barrels just absolutely refuse to come clean with mechanical cleaning, so I break down, take it to the 'smith, and have him use his Foul Out electrochemical rig on it. Someday, I'll build one of those things. Amazing how much crud comes out, even after I've worn out my elbow joints and shoulders trying to mechanically clean.
