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Posted: 1/22/2008 12:12:32 PM EST
RRA NM stainless steel barrel is "air-guaged".
What does that mean?
Does it imply anything regarding how the rifling is done?

Link Posted: 1/22/2008 12:26:02 PM EST
Air gauging is a way of checking the consistency of the bore. Air leaking past a plug in the bore is measured as the plug is pulled down the length. If the leakage is almost the same the whole way down the bore the barrel has a very consistent diameter.
I don't know how the leakage rates translate to irregularities .
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