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Thread: Using the M2 30.06 to measure muzzle wear question

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  1. #11
    Legacy Member imarangemaster's Avatar
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    IIRC, 1/4" on an M2 Ball round is about 0-1 on a gauge, 3/16" is 1+, 1/8" is 2+, and 1/16" is about 3+. My Inland has a tad over 3/16" on an M2 Ball round, and shoots VERY tight groups.

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