I have not cleaned my Garand bore in years. I was always scared I might damage it. But there comes a time when you've gotta cry BS and do something. I think it's that time now. I Think what I'm going to do is screw the cables and boresnakes and get me a muzzle end bore guide and using my fiber glass rod, clean it by shoveing the rod gentle down the muzzle, putting a patch on and pulling it through with the first patch soaked in Deatons Deep Clean, which is the best copper cleaner I've ever used. It will remove the carbon which covers the copper and makes it darned near impossible to remove. Then it will soak into the copper and release it from the bore. The second patch comes out dark blue. Then I put another patch through again soaked with Deaton's and let it sit about 15minutes. Then push clean patches through til they come out clean. After about five patches I like to spray one with Rem Oil or Breakfree and run it through. Then proceed with the clean patches again until they come out clean. In my SS barrels this is almost immediately, but with chrome moly barrels it takes about twice as many patches.
Believe me, if you want to safely get rid of copper, Deaton's Deep Clean is the best and fastest one I have ever seen. I can clean a bore with shooter's Choice or Hoppe's Copper cleaners and push patches till they come out clean. Then push a patch with Deaton's on it and it will come out dark blue, in other words full of copper again. However, the opposite is not true. I have used Deaton's and pushed the patches til they come out clean, then followed with a treatment of the other, and not picked up any copper. Deatons is on the net under Deaton's Gun Care Products. Try it, you might like it. Be careful it has lots of ammonia though. However it won't damage your bore because it has lubricants in it that keep your bore from rusting up. Dont get me wrong here, I don't work for these people, or profit inn anyway from their product, but I'm plenty excited about it since I've tried it, experimenting with it and now i use it for all my bore cleaning. It not only gets copper but seems to clean everything from my bores. Just spreading the word.