help me understand


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yotesmoker
January 27, 2012, 09:20 PM
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?

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Kevin5098
January 27, 2012, 09:42 PM
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.

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