I can't believe that Griffon and Howe wouldn't measure bores (I know that liability is the governing factor with most in regard to old guns). Many years ago (so, obviously, old news) I sent them a Fox to extend the chambers and lengthen the forcing cones. The smith called me and said he could and would lengthen the chambers, but would not lengthen the cones because it would make the barrels too thin in that area. I respected that. With all we know about wall thickness and pressures, I'm very surprised by your experience. I think you are doing the right thing.
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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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