I have a bunch of different products, but always finish off with Hoppes #9. Guns just don't seem "clean" unless they smell like Hoppes when I'm done. Hoppes also has a special copper cleaning version of #9, but regular #9 cleans copper, too. Hopps Elite Gel is good stuff, too. As I get older, I'm staying away from the harmful chemicals found in most cleaners. There's a whole line of bio-degradeable, non carcinogen containing cleaners out there. Read the back of some of these cleaners . "This product contains ingredients KNOWN to cause cancer". M-Pro 7 has a whole line of the stuff. If you ever shoot lead, pick up a Lewis Lead Remover from Brownells. I scrubbed and scrubbed with everything I had and I could still see the lead. One pass with the Lewis and the lead came out in long strips. Amazing product.