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Posted: 9/18/2015 9:11:23 PM EDT
I am new to checking headspace. Bare with me. I checked headspace in an AR10 I built with a go-guage. I can get the bolt to close on it but it's very tight. So tight I can't get the bcg back with the charging handle. I guess I'm on the good side of the problem. But is it safe to fire? Is it short-chambered? What are my options? Thanks in advance.
Link Posted: 9/19/2015 5:38:30 PM EDT
[Last Edit: 9/19/2015 5:41:33 PM EDT by hockeysew]
Was the bolt stripped of the extractor and ejector when you checked it? It should be.
When checking HS you should only need moderate thumb pressure to close the bolt, no unreasonable force required.

Snug is OK, too tight a HS can be a problem, you don't want to see an over pressure situation.
If you elect to fire the weapon check the brass for signs of over pressure.
Link Posted: 9/19/2015 8:47:05 PM EDT
The bolt was stripped. How do i check brass for overpressure? I'm not a reloader. I do have calipers though.
Link Posted: 9/20/2015 6:28:08 PM EDT
308 Go Gauge or 7.62*51 Go Gauge?
Link Posted: 9/20/2015 8:54:45 PM EDT
308
Link Posted: 9/21/2015 8:38:09 PM EDT
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Originally Posted By ARhabit:
308
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If there is the least bit of force required to close the bolt with the Go-Gauge then you need more headspace.
a) you might be able to get away with it in a bolt rifle,
b) you can get away with it if you do all your own loads.
Link Posted: 11/21/2015 10:15:14 AM EDT
Make sure the chamber is scrubbed super clean, with a brush and CLP, or something of that nature.....try some factory loaded ammunition, chamber a factory loaded round and see it it extracts with minimal effort........If it wont extract with minimal effort I would be concerned a little........I assume the BCG wont close on a "no-go" gauge
Link Posted: 3/11/2016 10:58:44 AM EDT
i would rather have tight headspace than loose. i load my own so it doesn't make much difference to me. carefully chamber a factory round and see if the bolt locks up, it should. as far as it being hard to extract, that could be due to it needing break-in. jmo

Bruce
Link Posted: 4/20/2016 9:10:15 AM EDT
What happens if the bolt closes very easily on a no-go gauge? I am building an Aero M5 and have a Ballistic advantage barrel and an Aero BCG. I tried the no-go gauge as well as commercial Federal .308 and surplus 7.62x51 nato and the bolt closes on everything.
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