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I'm looking at a 12 gauge 1883 O-grade toplever. The gun is in overall very good condition and does not appear from the pictures to have been fooled with. The seller says the bore is .730". Would this be correct? On page 517 of Vol II PP tells me that until around 1892 Parker bores were oversized with a 12 at .76". I have two D2s (1879 and 1889) with bores right at .765". Is an 1883 12 at .730 out of the question? Thanks
Question on correct bore diameter
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