Yet another vote for Wipe-out. Worked great on an old 30-06 that had not been cleaned well in years, decades maybe.

Another vote for Wipe-Out. I tried a lot of cleaners, but Wipe-out worked the best for me. I had a barrel that fouled easily and would take 20+ patches to get clean, but an overnight soak in Wipe-out does the trick now.

Rebarrel with something of better quality.

sako, I use Butch's and like it a lot. Good stuff.

I have tried hoppes 9 and Rb 17 and they both don't seem to get the barrel clean enough. The gun had a least three hundred rounds through it without cleaning. Accuracy has gone from .375 to 1.25 and doesn't want to come back.
What can I do??

Don't use in gas operated actions, like an AR15.

Wipe out has save me many hours and hundreds of patches.

I use Outers Foul-Out II for heavy copper removal such as from Barnes X bullets although I never leave the solution in, or the unit turned on all night long. It's got a 'done' indicator on it and usually only takes an hour or so. I also use Barnes CR-10 for light fouling or when I need exercise with a brush and patches.

I use Hunters Extreme Copper Melt. It is spendy but I will never use anything else.Look it up on the internet, I think its coppermelt.com, they can explain what it does better than I can.slygunner

Ammonia, the strongest solution you can get. 10% janitor's ammonia is way better than the 3-5% household ammonia, and the best is the concentrated 28-30% stuff used in chemistry labs. (The drug cops have scared a lot of U.S. retailers out of selling any stronger than the common household variety to the public, since it can be used in making "meth.") Cap the muzzle and pour the bore full, and let it stand for an hour or so, then go back to your usual cleaning techniques.

Actually, you can probably get all the copper out with the use of Barnes CR-10 and a nylon brush. Don't try to use a bronze brush, the CR-10 will just eat it.

I can hardly imagine the copper that CR-10 will not take out. But, if that is the case, then I would highly recommend the same thing that some folks use to clean guns when shooting moly bullets; that is Kroil and JB together.
Swab the bore first with Kroil then work on it with JB or USP Paste, or Rem Clean, or any of the good paste cleaners. You will be able to get the thing clean eventually.

Good Luck, R F

I've had good results with Sweet's 7.62

It's got enough ammonia.

G23c

Wipe out is the very best bore cleaner on the market. Try it, you will love it.