Brown-yellow residue on the OUTside of my bore? Help!

D

daniyool

Inactive
Hello everyone. First and foremost, I'm a relatively new shooter, and I've always found a lot of help from TFL. So I'd like to thank everyone for all the great advice, past and future. Also, this is my second post, so I apologize in advance if this is not the correct place for this question.

I own a Remington 700 SPS Varmint with a heavy barrel. It's under a year old, and I've shot about 1000 rounds with it. As I was cleaning my gun recently, I noticed some brown-yellow residue (fouling?) on the OUTside of my bore. Kinda looks like dirt... No matter how many times I wipe it with Remoil or CLP, there is no end to it.

Now this might be a coincidence, but I noticed this happening after I switched from PMC to Winchester 7.62 FMJs. I clean my gun regularly and I do not hunt. Any help would be greatly appreciated... Thank in advance!
 
Last edited:
could be copper try some windex(it has amonia) and or some copper cleaner could be residue from the hotloads and burnoff the projectiles.
 
I think that NESHOOTER has hit the nail on the head so to say.

Copper fouling is pretty common and is easy enough to get rid of.

First use your normal solvent with a good brass bristle bush. If that doesn't get it, try Shooter's Choice as the next step. It is usually is enough to rid the fouling from my bores.

If that doesn't get it, get one of the solvents specially concocted to remove copper like Sweets 7.62 or the myriad of others now on the market. Don't use a brass rod or jag as the amonia (as mentioned above in the Windex with amonia) will eventually disolve your rod and jag.

When the solvent disolves the copper fouling, your patches will start to turn a blue color. That's the copper being removed.

I don't know if it is true or not, but a lot of experienced shooters don't let the amonia solvents sit in the bore very long, claiming that it can damage the steel. Might be something to that as the Army used a 30% amonia solution for Springfields and cupro nichol fouling and every now and then it would totally ruin a barrel according to the authors of the day (1920s or so). I follow that advice.

You can use wood alcohol to neutralize any remaining amonia in your bore before finishing your cleaning procedure.
 
If you use a Copper Bore Brush with Shooters Choice , or Sweets clean the brush with Alcohol when Your done. Those solvants will disolve the brush too.
 
Thank you for the replies, everyone. I actually ordered some Outers foaming bore cleaner a few days ago, would it be safe to use this on the outside of the bore?? It says on the bottle it cleans copper.
 
You keep saying "outside of the bore". What is your idea of "outside of the bore"? On the barrel? At muzzle end of barrel? At the chamber end? On the receiver? Can you post a picture of it?
 
Sounds like powder fouling on the crown. Some powders show this more than others, but its normal either way, and won't hurt a thing. If you have a good crown, this fouling will be a nice and concentric pattern. This is if we are indeed talking about the crown.
 
Is it possible you shot those 1,000 rounds before you cleaned the shipping preservative off the outside of your rifle? If so and if what you are calling the outside of your bore is the surface of the barrel, then you have probably cooked the preservative onto the surface. In that case, remove all the wood and composite pieces from the metal, wipe it down with mineral spirits until you get rid of the baked on residue then oil it with a good non-polymerizing gun oil and re-assemble.
 
Last edited:
I'm sorry, I don't know why I said "outside of the barrel". What I mean to say is the barrel surface. sorry for the confusion... :confused:

Edit: rr2241tx, I made sure I cleaned every spot of the rifle before shooting it, so I don't think it's the preservative...
 
You must log in or register to reply here.
Back
Top