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Old 05-04-2011, 11:27 AM
Unclenick Unclenick is offline
 
Join Date: Nov 2010
Posts: 1,100
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If it's a new bolt you want the NO GO gauge in order to leave some room for the bolt lugs to settle in a little. A FIELD gauge is used when the bolt and receiver have worked together for a bit. An alternative would be to use the FIELD gauge, but keep checking periodically to be sure you didn't grow past it as the lugs settled.
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Last edited by Unclenick; 05-04-2011 at 11:31 AM.
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