Knurling a chamber?

[SleazyRider]

Just curious---can a chamber be knurled like a valve guide and reamed to a tighter tolerance? When a rifle is rechambered, what exactly does that entail?

Thank you!

 

[rcmodel]

No it can't.

Knurling would leave a rough surface and the expanded brass would grip it so tightly you couldn't get it out.

Re-chambering consists of making a bigger or longer chamber by using a chamber reamer to remove metal from a smaller chamber.

http://www.brownells.com/gunsmith-t...mless-rifle-chambering-reamers-prod17643.aspx

That leaves a very smooth surface that allows case extraction.

IE: (You could re-chamber a .308 Winchester to .300 Win Mag.
But you can't re-chamber a .300 Win Mag to .308 Win.
Without setting the barrel threads back and starting over again.)

rc

 

[SleazyRider]

So, if the tolerances of a .22 chamber is "tightened up" for the purpose of accuracy, is the existing chamber reamed and a liner inserted and then re-reamed?

 

[rcmodel]

That is the only possible way to do it that I know of.

More likely though, a better barrel with a match chamber would be installed.

Sleeving a factory barrel chamber is not likely to gain you much except an empty wallet.

rc

 

[SleazyRider]

Thanks, RC!

 

[ApacheCoTodd]

Within certain dimensional parameters and in particular, with collectible barrels, reaming - sleeving and re-reaming has been a valid alternative for me in the past.

The current one on my list is an octagon barreled Marlin.

 

[rcmodel]

I agree.

But 99% of the time! by the time the chamber is ruined?
The whole barrel is ruined too.

And then a Redman's barrel liner is a very viable fix.

http://redmansrifling.com/relining_prices.htm

rc