My recent acquisition is an M-1 Garandicon (30-06 SA Dec 1943). The barrel has some bad muzzle wear (rodding), but the bore is not pitted and measures slightly over .303. I'm going to try counterboring to .308 (should I go larger?)until I start to see some sharp edges. I'm guessing about 5/8" to 3/4" in from the end of the barrel. If the gun will still cycle I'll shoot it for a while. If I can't make it cycle (enlarge the port, etc.) nothing is lost, I will just have to rebarrel. As is, the gun feeds and cycles fine but is not as accurate as I would like. Maybe counterboring will help.

Does anyone know if new barrels are pretty much good to go as is or do they usually need additional fitting and adjusting (head space, etc.)? Would I want to consider a used barrel? Why would someone take a good barrel off a gun?

I welcome and appreciate any comments.
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