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Old October 9, 2010, 12:00 PM   #6
guncrank
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Join Date: July 15, 2006
Location: Fern Creek ,KY and Metro Louisville at large
Posts: 430
A headspace is used to gauge distance between bolt face and the stoping point of the chamber, that can be the shoulder of case or the mouth or the rim.
That depends on cartigide design.
Some magnum cartidiges have a belt.
The go gauge is the nominal deminsion, the no-go is .005 or so longer
On the Savage close a go gauge in the chamber of barrel and turn barrel until it bearly touches go and lock down nut.
If a bolt closes on no-go gauge then you have excessive headspace.
CEW
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