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help me understand

Discussion in 'Rifle Country' started by yotesmoker, Jan 27, 2012.

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  1. yotesmoker

    yotesmoker Member

    Joined:
    Jun 11, 2006
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    Location:
    pa mountains
    what is ment when measureing the bbl of a m1 carbine by the numbers 1,0.....2.0 or something lile that.what is being used when measureing the bore.What are good and bad numbers?
     
  2. Kevin5098

    Kevin5098 Member

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    Dec 21, 2008
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    The number is the wear at the muzzle in thousandths of an inch over .300. Usually measured with a muzzle wear gauge inserted in the muzzle. Google "muzzle wear gauge" for more info.

    As a guide, 0 would be the ideal number for a brand new barrel. By the time the barrel reads three it has considerable wear.
     
    Last edited: Jan 27, 2012
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