Gunsmithing How to clean area right before chamber

[stello1001]

Hey all,

As title states, how do you all clean the area right before the chamber and even the chamber too?

I keep getting chunks of carbon making their way into the chamber and then they fall to the open area before the chamber. I first noticed this when I couldn't get the bolt closed on a live round. It's almost like the round was too big or long. After a minor inspection, I noticed the bolt face had black rocks.

My rod guide goes right up to the neck. So when the patch comes out of the guide, it can't clean the chamber. I have slid the guide back to allow the patch to come out before and open up. I spin around a bit and then drive it forward all the way. But I still have a million little carbon rocks and brass shavings. These are causing issues with not allowing me to close the bolt properly. My fireformed cases are also coming put with deformities due to carbon chunks getting jammed between the case and chamber wall.

Anyone else experience this? It's getting frustrating.

Also, I found these other things while I was in there. If anyone cares to know and tell me what it is I'm looking at, I'd appreciate it.

The 2nd picture in this group of 3 pictures is black fouling but deep down in the barrel. Maybe about halfway in the barrel that starts and goes out to the muzzle. The section before it has shiny rifling so I find this odd.

With how many carbon chunks I was getting in my chamber and bolt face, I thought I was going to have a major carbon ring but it didn't appear that way.

Thanks for any input.

 

[Maurygold]

Boretech is always the answer for rifle cleaning.

https://www.boretech.com/action-cleaning-kits/

 

[PB&J.]

Can you take a couple more photos of the area of your first photo, or maybe a short video leading the borescope into that area? Because that first black looks like the mother of all carbon rings at the top of your neck.

 

[stello1001]

Can you take a couple more photos of the area of your first photo, or maybe a short video leading the borescope into that area? Because that first black looks like the mother of all carbon rings at the top of your neck.

When you say the area of the first photo, you mean the first photo in the group of the 3 right?

If so, I should be able to get some more pics, maybe even vid. I'm not sure I can upload a video and it show the full quality, never done it before but I can try.

 

[Snuby642]

I have used Ed's Red to dissolve / loosen the carbon. I patch it wet in the whole bore and walk off for a bit.

Then brush / clean as normal .
I had one ar that had been neglected and was breaking off big chunks.

Had to soak a patch in the chamber and throat overnite.

 

[PB&J.]

Yeah this one. It looks like a huge amount of carbon buildup in the neck of your chamber.

You can try to remove it chemically with the usual carbon removers, but It looks too built up for that.

I don't usually recommend the use of CLR, but you may have to remove the barrel and get in there with a good CLR scrub. Just make sure not to leave it in there for longer than absolutely necessary and flush it all out with thinners/acetone afterward.

Abrasives are another option.

 

[Mike Casselton]

Clean your supressor

 

[JerkyFreak]

Big chunks of carbon probably comes from your suppressor as Mike mentioned.

Chamber area I use an oversized jag well wrapped with a patch. For the bolt-lug recess I use an old toothbrush

I see a lot of corrosion (yellow). How often do you clean and oil the barrel? The blue areas look like machine marks, but it is strange that they are still so prominent. Did you perhaps put a brush on a drill and use it with Losso or JB or Butch to clean the chamber/throat area?

Below the areas circled in blue looks like corrosion pitting. Or the carbon buildup is so thick that the pitting may be chunks breaking out. I think if that was the case you would have major pressure signs. Yellow area looks like machine marks. Shoulder area looks very shiny compared to the neck area. Did someone perhaps touch-up the chamber with a reamer?

Below, the horizontal scratches in the groove is concerning. It could be leftover machine marks, but it looks as if a brush was spun in the bore. The black looks like carbon in the corner of the grooves. If this photo is after cleaning, it suggests that your cleaning regime need some adjustment.