Copper fouled barrel in M1D Garand

[Linstrum]

This is the first time I have had to deal with really heavy copper fouling. I already did a search on removing copper fouling, and did a lot of reading. I'm a chemist, and know about using strong ammonium hydroxide solution that selectively reacts with copper to help remove it. In the M1, I'm aware of plugging the gas port when filling the barrel with liquids.

I just picked up an M1D from a young guy who didn't know what he had or what it was worth. His grandfather passed away some years ago and left him his CMP M1D that has the scope and mount, bayonet, and field cleaning kit that goes inside the butt. The flash hider got lost, though. The receiver has not been re-Parkerized, there aren't any import marks, the operating rod is stamped NM for National Match, it has the CMP carrying case with egg crate foam lining, and there are several enbloc clips. About not knowing what he had, he shot it a lot for years without ever cleaning the barrel. I checked the operating rod and it is not bent from using heavy hunting load type ammunition, thank goodness!

I already put in a lot of time wearing out several bronze brushes, using kerosene to wash out the crud. I've had a few milsurps with copper fouling that I used Bon Ami scouring powder and water to get cleaned out, which worked pretty fast. But nothing like this barrel.

So, is there anything else besides ammonium hydroxide solution, wearing out bronze brushes, and using Bon Ami scouring powder, plus making my arms hurt, on getting this collector's item rifle barrel cleaned out that is messed up with heavy copper fouling?

I've owned an M1 Garand since 1981, which I put a new GI barrel in myself, back when the original barrels were still available.

Thanks!

[Rickf1985]

Considering the rarity and value of the gun have you considered sending it back to the CMP to have them go over it? After all, there are no gunsmiths around that know more about Garands than those at the CMP.

[ShooterAZ]

Sweet's 7.62 Solvent is what I use for serious copper fouling. Yes, plug the gas port and remove the bolt so you can flush the solvent out after cleaning. Be sure to follow the directions, it should not be left in the bore for long periods of time!

[starnbar]

You got any G I bore cleaner? It will work but remember you have got to clean the bore good after using G I stuff it will rust on you in a New York minute

[kootne]

Years ago I shot over the course matches with my Dad's old M1 NM. One match would show copper fouling pretty heavy just by looking in the muzzle. This is how I would clean it. I drove a 20 penny nail into a stud in my garage so the rifle could hang from it muzzle down by slipping the nail between the sling and buttstock (sling pulled up tight). This would let it hang down at a slight angle which put the gas port at the upper side of the bore. I used a bore guide made for the M1 to prevent wear from the cleaning rod. The nail was at a height that left the action at about eye level. With the action open I would slip the rod up through the bore from the muzzle and then would thread the patched jag onto it by spinning the rod. Then I would pull the rod out of the bore. What was accomplished by this method was;
1. Only a minimal if any solvent can get into the port opening.
2. Pulling on the rod eliminates it bowing and contacting the bore under pressure as it would if the patch was pushed through.
3. Muzzle down eliminates bore cleaner seeping into the action and softening the bedding or stock.
4. No disassembly of the weapon required.
I would run a couple passes with bore cleaner, (I was using Hoppe's #9 which I understand has since been re-formatted and may not work as well on copper). Then I would roll up one of the wet patches and push it in the muzzle to plug that end. I would put a fired case in the chamber and close the bolt. I would let the rifle hang a day and repeat the process. 2 or 3 cycles would eliminate the "green" on the patch. Leaving the bore wet and plugged very much increased the efficiency of the bore cleaner, reducing the number of cycles required.

[recumbent]

Sweets 7.62 will remove it.

[fc60]

Greetings,

I cleaned GrandPa's old 03-A3 with an Outer Foul Out electronic cleaner. It took quite a while to remove all the Copper; but, it did come clean.

Cheers,

David

[charlie b]

I tried a lot of stuff to remove copper. Yeah, the ammonia solution will work but it takes a LONG time with bad fouling.

But, I tried KG-12 one time and was hooked. When you can swab the bore and watch the copper dissolve it is worth it. Also does not need an overnight soak with bad fouling. Every few minutes or so you swab the bore with a fresh patch of the solvent until the copper is gone.

There are now a few other non-ammonia copper removers out there. Have not tried them since KG-12 works so well for me.

[Gtek]

Bore Tech Cu+2 Copper Remover and lose the brass brush.

[Nobade]

Gtek beat me to it, but I was going to suggest Bore Tech Eliminator. That stuff eats copper and doesn't have ammonia in it. Use with aluminum cored plastic brushes or it will destroy your brush.

[Cast10]

So my dad had a Winchester Model 100 in 308. That’s an older semi-auto. It had lots of ball ammo shot through it over the years. It began flinging shots and even blowing the op rod off. Was told that it was shot out and so he put it away back in the 80’s. I got my hands on it believing I could revive it. It was heavily copper fouled. I spoke with a man in my circle who makes barrels/rifles.

Foaming bore cleaner in the barrel and let it set 10 min. Clean with patches. Repeat. Use a brush along the way. Clean with patches until they come clean/white. It took me 92 patches and two brushes! Straightened the op rod and receiver forks, assembled and it has been firing fine ever since.!!!!!!

You’ll also realize you need to do it on other rifles as the accuracy deteriorates. Don’t get rid of the firearm!

[Gtek]

Same stuff, gold boar on black bottle. Very impressed with product but have not figured out how to protect threaded end collar on Dewey.

[nicholst55]

I have cleaned up a number of badly fouled milsurps over the years. I would recommend one of the foaming bore cleaners to start with (soaked overnight), just to break the carbon loose. After that, either KG-12 or Bore Tech Eliminator for jacket fouling. You may also need some JB Bore Cleaner (an extremely mild abrasive paste). Just be patient, and don't do anything drastic that you might regret later! You will also doubtless need to clean the exterior of the rifle and relube before you begin shooting it.

[Win94ae]

You just have to keep at it, I know exactly what you are going through.

I use Hoppe's 9, rubbing alcohol and penetrating oil to clean my barrels. I clean with the Hoppe's on the brush 10 or so swipes let sit for few minutes another 10 swipes, run a dry patch.
Do the same with the brush and oil, then again with the alcohol. Repeat until it is clean.


https://www.youtube.com/watch?v=r8_OAFYD9Bc

[samari46]

I've used Butch's bore shine to clean the copper fouling in my Ruger American compact rifle in 7.62x39 and an elderly Chilean short rifle in 7mm Mauser. Works by chemical means so cuts down on the bore brushing and patches. Wet a patch (I use a chemical lab type bottle with spout) and stroke it back and forth. Don't know what Ruger used for ammo but probably some eastern block junk. Frank

[1Hawkeye]

Like others have said sweets 762 solvent and use a nylon bore brush. When the patches quit coming out blue the copper is gone just be sure to oil the bore when you're done.

[MostlyLeverGuns]

Bore Tech Eliminator and Pro-Shot Cu Remover work better than Sweet's for me, are safer on the steel and have a lower chance of doing bore damage when left in the bore. Hoppe's BENCHREST (not the old #9) works well and is safe to leave in the bore. Some of the newer solvents DO WORK BETTER than the 'old standards'.

[Eddie1971]

Sweets is best I found for copper fouling. No need to damage the barrel with a bore brush over and over again.

[charlie b]

That's why the non-ammonia copper removers are so good. Don't use a brush at all. Just a patch.

PS IF the bore has heavy powder fouling that is best removed first. Then the copper solvent works better.

[Winger Ed.]

I got one like that awhile back. It had been fired until the accuracy fell off from never being cleaned.

I wasn't in a rush, so just to see what would happen-
No bore brushing, but I ran a patch soaked with Hoppe's #9 in & out every day until it no longer turned green.

It took right at three months, and the barrel finally looked new again.

[john.k]

His M17 looks just plain pitted to me...(the utube video)

[wilecoyote]

284565
follow the instructions : it works
very little effort with cleaning rod, it does no damage, I've eliminated barrel deposits impossible to remove with anything else from a '37 milsurp so encrusted that I thought it pitted.

[Linstrum]

Gentlemen! Thanks for sharing what you know from your experience, along with what products to use, plus suggestions and ideas.

I looked at what Brownells has, and found everything, except GI bore cleaner.

Regarding GI bore cleaner, I have a copy of General Julian S. Hatcher's indispensable book for those who own U.S. military firearms from the 1898 War with Spain to the Korean War, Hatcher's Notebook, which may very well have the recipe for the GI bore cleaner listed in it, IF its ingredients are still available.

I now have some homework to do!

[rick benjamin]

Winger Ed nailed it on post 20.

[charlie b]

If you want something like GI bore cleaner try Ed's Red. Easy to mix up and it works well.

Kerosene, mineral spirits, acetone and ATF. Lanolin optional.