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AR15.COM
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1/13/2010 4:48:02 PM EDT
If my rifle (M1A) headspace measures 1.63, what size case headspace gauge should I use to check my cases?
1/13/2010 5:04:49 PM EDT
[#1]
Case guages are made to SAAMI spec's.  You need the .308 gauge for your M1A.
For headspace gauges, I'd recommend Clymer.
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