what's involved in changing barrels on a Remington model 12 .22 pump?

Grouse Man

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The current barrel on my Rem. mdl 12 (round barrel) has a poor bore. Rifling is present but clearly the early corrosive rimfire ammo has taken its toll. I had planned to reline the barrel at some point (which is easily a $200 job it seems) but I may have a line on a good replacement barrel. What is involved in replacing the barrel, and what sort of cost would be involved? I'm guessing this isn't something I can do at home.
 
The barrel is threaded into the receiver. So you'll need a barrel vise and a receiver blocking wrench to let you hold these parts firmly enough to turn them apart.

The barrel vise isn't a hard one. Get a block of hardwood such as maple or beech and drill a hole in the block that's just a little smaller than the barrel. Slice the block in half along the grain and you now have an excellent high friction set of clamping jaws for the barrel. Oh, I almost forgot that you want a good solid hunk of a bench vise as the source of the clamping pressure. Use a piece of 1.5 x 1.5 for this so the block is wide enough to have more grip. And it needs to be at least 5 to 6 inches long to avoid the pressure splitting the wood along the grain.

The receiver is going to be a little tougher. For this I'd suggest a filler block of the same hardwood that fits into the action and supports the sides well. It should be a snug tap in sort of fit but not so tight that it requires serious hammering to fit. On the outside you cut a notch into a cover block and then use a couple of long 1/4 inch bolts to bolt the whole works to a 2 or 3 foot long piece of hardwood again.

If you can't find a source of maple or birch for this then at least use fir. The regular construction woods piled up at Home Depot and the like are far too soft and are totally useless for this sort of work. It has to be hardwood. A single stick of 1.5x1.5 3 to 4 feet long will give you the amount you need to make all this stuff up. Of course it's hardwood so you'll need some decent wood working tools to cut, drill and otherwise shape it.
 
This replacement barrel. A good take-off from another Model 12, or a random 22 barrel that will need a bunch of work?

It's a chore one way or another. Dunno what the odds are that a swap barrel will fit reasonable well or not either.

Personally, I'd line it were it mine, but I have the technology to do so and ream the chamber.

Cheers
Trev
 
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