Ok…I need to clean my 22CM after 307 rounds

[ChrisAU]

Or part of it anyway. Noticed bolt was hard to close towards end of hunting season, got the bore scope out a couple weeks ago and started working on this spot where the chamber begins to neck down:



Some C4 carbon remover and a lot of elbow grease later with chamber brushes and it’s almost all gone. One more evening session with it and I bet it will be fully removed.

However, area 2, the breech face, is being more stubborn - this pic is after a lot of 15 minute soaks with C4, a brass pick, and long pointy swabs:



I suspect this is the area actually giving me a hard bolt as the bolt face rim rotates on this surface when opening/closing the bolt.

Any tips? Longer soaks? I can’t scrub it like I could the other area. I don’t really want to take off the barrel but I could. I did get some Iosso Bore Paste and it seemed to dissolve more than the C4 but I’ve only done a couple sessions of it. Should I leave some caked on over night?

I believe this is from walking around with the rifle slung over my shoulder and Carbon falling out of the suppressor and into the chamber. I’m open to other theories though. The rifle is not stored upright in my truck or at my house.

 

[Judd]

Not sure what it is...but if I have carbon to clean...I pull out a q-tip and CLR. Do not let the CLR marinate, clean it off then follow it with alcohol to remove all the CLR. It will etch stainless and is not good...but it will suck carbon off a suppressed muzzle like nothing I've ever tried.

Saying that, you commented about the bolt face rim...there is clearance there, the bolt should not touch any part of the barrel. 7 thousandth on the tight side and 15 thousandth on the higher side. That's not a bunch of room and I suppose if your theory is right that it's a carbon chunk...the bolt could be grinding it up. Who knows where it came from...your theory is as good as any.

Should've added good luck...also, is the cerakote color you used FDE AI? I recently used that color the first time recently and it came out way better than I expected...I like it.

 

[ChrisAU]

Not sure what it is...but if I have carbon to clean...I pull out a q-tip and CLR. Do not let the CLR marinate, clean it off then follow it with alcohol to remove all the CLR. It will etch stainless and is not good...but it will suck carbon off a suppressed muzzle like nothing I've ever tried.

Saying that, you commented about the bolt face rim...there is clearance there, the bolt should not touch any part of the barrel. 7 thousandth on the tight side and 15 thousandth on the higher side. That's not a bunch of room and I suppose if your theory is right that it's a carbon chunk...the bolt could be grinding it up. Who knows where it came from...your theory is as good as any.

Should've added good luck...also, is the cerakote color you used FDE AI? I recently used that color the first time recently and it came out way better than I expected...I like it.

It’s standard H265 FDE