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Re: Groove diameter

Posted by Thomas Jacobson on Wednesday, 13 August 2014, at 8:29 a.m., in response to Re: Groove diameter, posted by Tom Trevor on Tuesday, 12 August 2014, at 10:48 p.m.

My 'like new' M1884 rifle also has a bore in the .45xx range. I slugged the bore using a soft lead fishing weight. I then tightly wrapped the slug with a known thickness of paper and measured that diameter, then subtracted (by double) the paper measurement to get the actual bore diameter. Is that an acceptable method?


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