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Re: Bore diameter
Posted by Don Harpold on Monday, 13 December 2010, at 4:13 a.m., in response to Bore diameter, posted by Thomas Jacobson on Sunday, 12 December 2010, at 5:22 p.m.
The bore would be .450
The rifling depth is .005
This per Ordnance Memoranda 15, 1873
If you do not have a three jaw micrometer it is difficult to measure with any accuracy.
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