Bob, it took me a moment or two to understand your table of figures, but now I see what you were saying.you have a difference between the bore of .751, and the muzzle of .722, giving you .029" constriction. It depends on whose chart you read, but it's certainly closing in on full.
My only question is your table doesn't seem linear, and looks like it bells in the last inch or so.
All of my Parker choke reamers are very straight. (but tapered, duh)
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