I have tried just about all the cleaners on the market or copper cutters.

I see some here love shooters choice, but I would have to work for hours to get out the copper from RUM's with shooters choice. Its just so weak a copper cutter. I put hopps benchrest in this catagory too.

So I turn to sweets or CR10. CR10 if not tended too can really screw up a barrel. It can cause surface rust in 10 min. Ok, now sweets don't seem near as bad. They say (and they say alot) that the rust that occures is the water in the CR10, not the ammonia, the ammonia only speeds up the hydroscopic reaction? I would love to know for sure.

Ok, so I use wipe out. Seem to have good results, can't say I ever seen surface rust. Even though I am shocked after sitting two days with several applications. But not sure if it actually cleans out all the copper. I used wipeout for a few years now. And thought my barrel was clean, but saw copper strips at the top one inch of the barrel. So I bore scoped and still some copper.But my patches were clean. Only thing I used to get that copper strips out was JB's bore bright or the real original. But JB's scares me. It is abrasive.

So looking for the next latest greatest. Montana Extreme. What do you guys thing? Copper Melt, butches? Some say montana has no water in it. So its aggresive like CR10 but won't surface rust your barrels in minutes. Need some educated opinions.