Cleaning Years Of Caked On Fouling...how?

Try some Wipe Out foam bore cleaner,amazing stuff.Make sure you get it all out of your gas cylinder, though.JB paste works well,but is an abrasive.

JB is a rouge, so even a clean barrel will result in patches that come out dark. While your bore may indeed have old fouling as you state, the fact that patches are coming out dark when you use JB is NOT evidence of that.

It's like saying you'll polish a doorknob with Brasso until the rag stops getting black!

+1 with Wayne. Wipe-Out is the best bore cleaner I have used. Magnum rifles do a very good job of carbon fouling and I have used so many different bore cleaners. Wipe-Out is a foaming cleaner that works without scrubbing. You spray it in the barrel, let it sit for a few hours, push it out with a patch. Very simple. For a nasty barrel, you might have to repeat the cleaning.
If you can't find it locally, Midway and Brownells carry it.

Foaming.
Bore.
Cleaner.

I've used it on a couple of old milsurps, that looked like chimneys...Works great (although it may take repeated applications)...And its a HECK of a lot less work. I only leave it in for 10-15 minutes, then give it another squirt. When it comes out clean I the use a dry patch, 1 wet patch, and one with a little oil on it. Seems expensive at $11-12 a can, but it goes a long way.

Plug the barrel and then fill it with Carbon Killer and soak over night. www.slip2000.com

Have to agree on JB's, all you're doing is polishing the barrel and will always get black patches out of your barrel.

Foams work good.

I recently tried one of the foaming bore cleaners and like it. If you want to stick with liquid solvents, try Shooters Choice. It works like Hoppe's used to work.

I have not had good resuls with foam. The best cleaner I have found (for your type of use) is a 50/50 mix of Shooters Choice and Kroil. I works great.

Joe Mamma

Take the barrel off the gun. Get a 6" diameter PVC pipe, and cap one end. Fill it with kerosene and drop the barrel in. Let it soak overnight. Rinse and clean as normal.

I recently got another CMP Garand and have reason to believe the barrel was never cleaned properly.

Tried alternating brush, JB paste, and Butch's Bore Shine and the patches kept coming out blue, so I unlimbered the old Outers Foul-Out II and tried that.

After three cycles, the rod was still coming out heavily plated with copper.

So I plugged the chamber and the gas port, filled the barrel up with Hoppe's #9, and let it soak for 48 hours.

It's clean now. Looks good - shiny, no dark spots or pitting visible. Should be a good shooter.

Persistance. Easy advice to give, but I have a Garand on order. Hope I can take my own advice. I like the idea of overnight soaking.

Are you sure?

Just wondering here, are you SURE you're looking at carbon? I'd expect a Garand that had been shot a zillion times and never properly cleaned to have a fair amount of copper in it, maybe oxidized by now, plus zinc and whatever else was in the jacket material. Reason for the question from the chemistry perspective is that some things like Ed's Red or Butch's Bore Shine are better on say, copper than they are carbon. Brake cleaner's not a bad idea, and I've used a lot of it on cruddy .22s, was just wondering what made you sure you were looking at carbon. I haven't done this to my Garand (yet... and it's a CMP, too) but taking the whole thing down to parts and overnight soaking (hey, it can sit in kerosene for a week, won't matter) is a great idea. I mean, yeah, it's a pain, but I suspect that going halfway over and over might cost you more time in the long run. Could be that the sooner you take it down all the way the happier you'll be. God knows what crud could be lurking where you don't expect it... like the trigger group or piston... just a thought. Good luck.

I made an "electronic" bore cleaner from a 1/8" welding rod and a six volt lantern battery. I used a combination of some household cleaners (they WILL remove bluing - be careful) and settled on using Hoppe's #9 - both worked VERY well.

I've been happy with the performance of MPro-7.

BTW, if soaking the bore overnight or longer, be careful WHICH solvent you use. I specifically used standard Hoppe's #9, since it's safe to leave in the bore indefinitely; some of the more aggressive solvents (Sweet's 7.62 is among the worst for this application) ought NOT be left in the bore for more than 10-15 minutes or so.

im a huge fan of less work is better. had a stainless steel trough built for jus such purposes. then dunked in Sweetshooters a few days, in the heat outside.
took out , used Gunslick foam cleaner, let sit for about 15 mins. patched out, repeat. couple of passes with brass brush. Patch clean out the rest of it.
"so clean that the Virgin mary herself would be proud to...".

Did you scrub it out with a brass bore brush? Just wondering, because it would help alot also.