copper solvents

[Rustywreck]

I don't know if this applies directly to reloading, but I messed around with some copper solvents that claim to dissolve copper in rifle barrels.
I didn't set out to do a test, it was a matter of curiosity. I put some Hoppes Copper Terminator on a damaged bullet, and nothing happened - even when left for hours. There was no blue on the towel or any sign that the jacket of the bullet was effected.
Wipe Out did leave some blue on the towel and the jacket of the bullet was changed. It was brighter and seemed softer; however, it was not dissolved.
My question is what is the best stuff to use to remove copper from a rifle barrel, or clean it for that matter?
I've read some stuff about cleaning, but there is to much that is contradictory.