Lever rifle re-chamber

[chasb11104]

I woke up at 1:30A.M. and for some reason this popped into my itty, bitty head.  Actually head is big with much empty space inside.  Every posting I read regarding a re-chamber to a similar but different caliber requires removing the barrel, cutting at the chamber end and re-cut the new chamber dimension thus shortening the barrel length and bringing the rear sight dovetail closer to the receiver.
So what would be the feasibility of casting the existing chamber, machine a copy of the casting, bore the new caliber dimension into the copy and use the product that cements barrel liners in place to secure the new "chamber" in place.  You could also possibly pin the new chamber copy in place at 6:00 or 5:00 and 7:00. If the "new" caliber cartridge is shorter, there might be a small amount of free-bore but we have that with most our our pistol cylinders anyway.  Free-bore would be within the new machined chamber.  The exterior dimension and appearance would not be altered.
Thoughts from more knowledgeable cowpokes appreciated.
Chas B 

[Abilene]

I don't know.  I'm not a gunsmith.  But I knew a guy who bulged the chamber on his old 44-40 '92 and was able to have the chamber relined.

[Cap'n Redneck]

If you, say have a .45 Colt rifle and make a "chamber liner" based on the original chamber and you chamber it in .45 Schofield or .45 ACP you will be left with a wafer thin ring of liner in front of the new, shorter cartridge.  I would worry that this thin liner could crumble upon firing and obstruct the bore. A .38 Special chambering in the chamber liner would be safer, but that would send a .357" bullet down a .452" bore without touching the rifling...
(there are "drop-in" chamber liners for shotguns that will allow you to fire a .45 Colt cartridge down a 12 gauge bore, but that is for close-up kill-shots on wounded game, and not for precision shooting at all.)
For the chamber liner concept to work you would have to machine out the old chamber and-then-some to leave room for a liner of sufficient wall thickness.  I would still have concerns about the gap between the liner and the forcing cone; it being a place were corrosion could take place and/or leading could occur...
The concept would be viable in order to save the outward appearance of a collectible weapon, but I'm not 100% comfortable with it for a competition gun.

[Coffinmaker]

  Chasb 

Nope.  Not do-able.  With PLUS ONE for Cap'n Redneck.  A re-chamber as you describe would be extremely thin and would "shoot out" rather quickly.  Nope. can't do that.

A chamber can be re-done, repaired, etc., but has to be done with a liner, where the hold chamber is machined out and a new chamber, appropriately THICK, is machined and inserted.  this leaves the original barrel intact.  Or cut the barrel, set it back and cut a new chamber.  There is no "quick and easy."