[Drew Hause]

Brian: regarding British proof and MWT. There is no minimum below which the proof house will refuse to prove the barrels. They do notify the owner if they survive proving with less than .020". And BTW if pitted, the barrels must be honed prior to proving.

See
http://parkerguns.org/pages/faq/BarrelThickness.htm
and
http://docs.google.com/a/damascuskno...hIiY62Hx4/edit