Removing Crud
I have found that the best, cheapest and most accessable way to remove that crud is to take your BRASS bore brush, dip it in hoppes No.9 and run it back and forth. You may want to own 2 brushes, one for barrel, and one for cleaning other things. I use this technique on places on my autos that get really cruddy, and it works well. And since its brass, it shouldn't mar your finish (havnt tried this on blued, so I can't answer that question). BTW, after you have run the brush over it, take a patch and wipe it off, then lightly oil it before you go to the range the next time, and you shouldn't have a hard time getting it off anymore.
I have found that the best, cheapest and most accessable way to remove that crud is to take your BRASS bore brush, dip it in hoppes No.9 and run it back and forth. You may want to own 2 brushes, one for barrel, and one for cleaning other things. I use this technique on places on my autos that get really cruddy, and it works well. And since its brass, it shouldn't mar your finish (havnt tried this on blued, so I can't answer that question). BTW, after you have run the brush over it, take a patch and wipe it off, then lightly oil it before you go to the range the next time, and you shouldn't have a hard time getting it off anymore.