Brent
I would have suggested Sweets also, in conjunction with Shooters Choice and or Butches but, I think Moose hunter was asking for some "Home" remedy stuff as to where he is located? Straight ammonia would not be the way to go for him, or anyone for that matter.
Sweets does have other ingredients besides ammonia too.
I gave him some ammonia based copper remover bore cleaner in with the Hoppes #9 which is the basic mixture they use in their copper remover line.
Darryl