Gunsmithing cleaning chamber on .308

KHOOKS

Gunny Sergeant
Full Member
Minuteman
Jun 29, 2008
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Central Alabama
At the range I had a few cases with a hard bolt lift. Looking at the brass no signs of pressure but I did notch a same amount of carbon stuck to the case neck area ahead of the shoulder. I clean my rifle with a bore guide and not sure how good a cleaning the neck area of the chamber is geting I normally only run a jag and patches down the bore never had a brush down the bore of this rifle (LTR). So my question is how the best way to clean the chamber and/or neck area of rifle.

Ken
 
Re: cleaning chamber on .308

My method:

Go to harbor freight and buy a $5 pack of bottle brushes with nylon bristles. One of them is about 1" in diameter, with the bristles running along 3" or so of the brush. Use dykes to clip off the loop on the end. Douse with MPRO7. Chuck in cordless drill in low gear. Use a back/forth "honing" technique. Patch the bore, use compressed air in/around bolt lug recesses. Patch bore once more to get any remaining mpro7 out. Done.

My rifle manifest a dirty chamber by increases force/difficulty in chambering a cartridge.
 
Re: cleaning chamber on .308

I've never had an issue with a dirty chamber in any of my rifles but I don't clean the way many folks do.

I never push the crud out of the barrel and into the chamber/receiver area of the rifle. I always run the rod down the barrel till it come out of the barrel at the receiver end, then I put a solvent soaked patch on it and pull it towards the muzzle end of the barrel. Same with the brush. I pull it from chamber to muzzle so the crud I'm removing from the barrel doesn't get deposited somewhere else in the rifle.
 
Re: cleaning chamber on .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 81Z4ME</div><div class="ubbcode-body">I've never had an issue with a dirty chamber in any of my rifles but I don't clean the way many folks do.

I never push the crud out of the barrel and into the chamber/receiver area of the rifle. I always run the rod down the barrel till it come out of the barrel at the receiver end, then I put a solvent soaked patch on it and pull it towards the muzzle end of the barrel. Same with the brush. I pull it from chamber to muzzle so the crud I'm removing from the barrel doesn't get deposited somewhere else in the rifle. </div></div>

I find that after several hundred rounds, chambering a round starts to feel tighter, which is when I clean it. Mind you, this happens without having cleaned the bore at all. I once forced a round into a dirty chamber - and learned my lesson - never again.
 
Re: cleaning chamber on .308

I use a Sinclair flexable chamber rod and put a brass loop on it. I then take 2 or 3 patches square (depends on the actual size of the patch) and pull corner through until I have 1/4-1/2 inch hanging out and the fold the large portion of the patches back over the front of the loop and the bit I pulled through the loop (this is very similar to how you put the patch on an Otis kit) and then soak it in solvent. You can then insert it into the chamber and turn it while being sure to get up into the shoulder and neck of the chamber. I do this as needed (usually 1 time some times twice each time I clean). I then use a chamber mop to dry the chamber out.

Also remember to make sure your chamber gets dried out after cleaning the bore. Solvent will flow back into the neck and shoulder area b/c a bore guide seals in the body area not the neck, FWIW.