dam, your go, no go gauge idea makes sense, if dealing with uk made guns only...over here we have guns made all over the world, with many different standards...do you have a standard for minimum wall thickness in front of chambers?
ed, why would you persist in the notion (we’ve been over this before) that there exists a magical, minimum, standard bore measurement that would be correct for all guns, old, new, of different gauge, and built in different countries of different qualities of steel?
Why do you persist in hounding people, seeking this magic number? This is not the first time you have attempted to wrangle a simple answer to this complex question. The answer is the same as the last time you asked.
Best,
Ted
PS UK proof is of use to anyone buying a gun in signature countries of the proof law, most of Europe. Further, it is of use to people here, in the US, for knowing the bore dimensions of a gun, what the service level of use the gun was designed for, and whether those bore dimensions have changed, since the time of proof.
