Thr reason I ask is the gun in question, a 12 has bores of .745 and .740, definately out of pro0f for a 12 in diamond marking. However the walls are .082 & .085 9" from breech, .038 & .037 at the mid point of the barrels and .027 &.032 9" from the muzzles.

The gun would be in proof if marked 12 over 1 in a diamond, overbored.

Am I correct to assume there's enough here to reproof and will the proofhouse re-proof an overbored gun?

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- Errol Flynn