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Thread: 12-43 Underwood bore

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    Legacy Member imarangemaster's Avatar
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    12-43 Underwood bore

    I decided to check the muzzle on the Underwood. I grabbed an M2 ball round (LC). put it in snug and came up with between 3/16 and 1/4' (about 7/32+"). Any idea what that would be on a muzzle errosion gauge? It is a tack driver, especially compared to some others I have owned.

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    Last edited by imarangemaster; 09-28-2009 at 08:15 PM.

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