I used to use Copper Melt, it was made in Canada and was the best stuff I have ever used. It was about $30 for a 6 oz. bottle but it came out to about .30 per cleaning as it took very little of it. I think they went out of business as I have not seen it for quite some time. Sweets 7.62 is good and I use it in my military rifles. I use KG 1 & KG 12 in all my other rifles and pistols, fantastic stuff. You can buy it on line. It smells like Windex and works like a charm. KG 1 removes the carbon and KG 12 removes the copper and or lead. What are you folks using?