I checked my record log which has bore diameter listed. My gauge is the one sold by Brownell's. I'm listing the date of manufacture for that reference.
.754/.754 1884
.753/.753 1886
.751/.756 1889
.761/.762 1889
.752/.751 1890
.753/.753 1891
.753/,753 1893
.734/.736 1896
.735/.734 1904
.732/.732 1912
.733/.731 1923
A small sample size, but it is suggestive. All of these guns measure with sufficient wall thickness (in my estimation and based on advice gotten from members here), and all have been shot numerous times.
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"Doubtless the good Lord could have made a better game bird than bobwhite, and better country to hunt him in...but equally doubtless, he never did." -- Guy de la Valdene (from A Handful of Feathers )
"'I promise you,' he said, 'on my word of honor, I won't die on the opening of the bird season.'" -- Robert Ruark (from The Old Man and the Boy)
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