Ed, minimum barrel thickness measurements are just that. You get that by checking the entire barrel from end to end. Proof bore measurement is 9” into the bore. You minimum thickness might be 20” down the barrel. Anything above .020 is shootable and above .025 deemed good in the trade. .033 and .034 are excellent wall thicknesses. And don’t be a further ass if you can help it. Almost like new wall thickness and looking at the high condition of this gun I suspect it has never needed honing or barrels struck and re-blackened.
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