msinc, I do have JB and will give it a try before re-barrel. I had already thought about cleaning with it, but I was not seeing the dark blue patches that I have usually seen with severely copper fouled barrels that I have dealt with in the past. At this point I am willing to try anything and this is the cheapest option.
HeavyBarrel
" A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government"
G. Washington
| 
