Thread: Shotgun chamber bushing?

Hello all,

I'm in possession of a Remington 11 semi auto 12 g shotgun that is having trouble extracting. Looking in the chamber, it has a number of pits. I've searched brownells, midway, and generally online, but I've not found a sleeve for a shotgun chamber. I've found one gunsmith online that installs a tight chamber in shotguns for $95 plus shipping. I'm wondering if anyone has done a chamber sleeve, or knows of a supply for such sleeves. I know I should probably just be looking for used barrels on ebay and gunbroker, but it just seems like sleeving the chamber on this barrel shouldn't be all that hard.

Thanks,

dave

Sleeving the full length of say a top quality antique pair of damascus barrels would not be unusual.

Sleeving just the chamber of a modern production shotgun:

1. would likely cost more than a fresh barrel
2. if the solder or epoxy holding the short sleeve isn't perfect, it risks letting high pressure gas round the front of it into the bored out space for the insert. - more area to act on, thinner walls to retain it

Someone posted a while back about the "low pressure" that shotgun loads operate at.

A vehicle tyre popping at 40 psi will happily take your face off. Shotgun barrels are designed to take the operating pressure without building in excess weight.

My 2 cents says buy a fresh barrel.

edit:
Check out your extractor for wear and try some different brands of cartridge too. 1970s made Mossbergs had difficulty extracting European made cartridges even when brand new, there was a difference in rim profile. Variations can occur.

how about a sleeve screwed in similar to a screw in choke ?

I might try some PC7 or JB Weld in the pits. There is also a Devcon product that is used for making stamping dies that is quite tough. Then use a flap wheel to make the chamber smooth.

While you are checking it out, inspect the breach block very carefully around the grooves that the locking bolt ride in. They are prone to cracking and can cause problems before they give out completely.

Originally Posted by Dave, tool duller

I'm in possession of a Remington 11 semi auto 12 g shotgun that is having trouble extracting. Looking in the chamber, it has a number of pits. I've searched brownells, midway, and generally online, but I've not found a sleeve for a shotgun chamber. I've found one gunsmith online that installs a tight chamber in shotguns for $95 plus shipping. I'm wondering if anyone has done a chamber sleeve, or knows of a supply for such sleeves. I know I should probably just be looking for used barrels on ebay and gunbroker, but it just seems like sleeving the chamber on this barrel shouldn't be all that hard.

Sorry to bump an old thread, but I came across this forum while doing a search on this topic, so I joined to post another inquiry on this.

I have exactly the same issue as the OP, it's a Remington pre-11 (mfg. in 1906) with the same issues as the above. I am interested in having my local gunsmith attempting to fabricate & install a chamber insert (retaining the 12 ga. chambering). I was wondering if anybody might have anything to add to this thread with regards to their experience on this. I know that it might make more sense to purchase a replacement used bbl, but I'm willing to go to the expense of trying to retain the current bbl - this shotgun has some family history to it.

My LGS has inspected the bbl and he considers it to be structurally sound, but has so far been unsucessful at polishing the chamber enough to get even low-base shotgun shells to extract from the pitted chamber.

Thanks,

Briley Mfg. does quite a bit of shotgun work of this type. If it can be done, they can do it.

Hi kendog, thanks for the reply.

I already checked the Briley website and it sounds like that is a relatively straightforward repair for them - for $275.

I checked a few gunsmith websites and the going rate seems to be ~$150. It looks like the last time the OP was here was Oct 2010, so I'm probably out of luck to see what his solution was, if any.

At any rate, my gunsmith called me this morning - with more chamber polishing the gun now ejects shells correctly. He was worried it would require too much material to be removed from the chamber but it looks like things may be OK now.

Anyway, looks to be a good forum here. Thanks,

I have used a product called Belzona E super metal to fill pits in chambers in an old double, just to see if it was viable. worked OK , but had to blast the surface in the bead blaster to assure the adhesion, then recut the chamber with a long throat reamer and polish abit. still hanging on 2 years later. I dont shoot it too much, and get it hot, so I cant say how the repair will survive in the really long run.

I know the stuff worked well on pump and air handler shafts that were galled heavily. Big difference in the expansion in a chamber tho...

Most of the chamber wall pitting in today's shotguns, is due to the plastic hulls. Heat, chemical reaction, condensation.................... I had the same problem when I shot ATA registered trap. Every day, home or away, get out the chamber brush, and Shooter's Choice. Then do the same to the choke area, and the full bore. Then swab the bore with a light coat of Starrett M1.
Regards,
Bob