Just wanted to share what might be the best kept secret in the shooting sports. I tried the KG Industries barrel cleaning products the past few days. Their KG-12 copper solvent contains no ammonia, and will not harm the barrel. It cuts copper like nothing else I've tried. Their KG-2 cleaner also removes copper, but the KG-12 is fatser. These products were developed for the military's "big guns". The web link is listed below. As a test, I tried the KG-12 for 2 patches, then KG-2 for 2 patches, then Kriol to loosen everything and then 3 dry patches. Just to check for copper that might have been left behind, I took a swipe with Sweet's (because it turns green/blue as it re-acts with the copper. The patch came out with no color. The KG-2 2 really cuts through powder residue as well. These products are the best I've found. Just wanted to share that with everyone.
Blaine
http://207.44.229.182/
Blaine
http://207.44.229.182/