I am amazed by what a high percentage of the stores have neither bore gauge or wall thickness gauge. How do you buy a doublegun made in 1917 without knowing the wall thickness or at least the bore diameter? If it is English AND you have the proof charts AND you have a bore diameter guage you can at least tell if it is in proof. Lord knows on the American guns.

I'm more amazed that these stores and many, many who are selling SxS have no idea there are gauges to measure such things and the importance of the results.

Nothing is foolproof to a sufficiently talented fool.