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Posted: 2/4/2014 7:12:23 AM EDT
| I apologize in advance if this topic has been covered ad nauseum, but I have read several threads and am still not sure what to do.....I just put a new RRA lightweight 5.56 barrel in my barely used RRA carbine (less than 100 rds). My headspace gauges are .223. The bolt closes on both the go and no-go gauges, flush with the rear of the receiver. Is this a problem? Do I need 5.56 gauges to know what's happening? Thanks for any input, folks! |
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A 223 REM No-go gage will sometimes fail in a 556 NATO chamber.
This is not necessarily a safety issue. You need a 556 NATO No-go gage (1.4706”). If the weapon fails the 556 NATO No-go gage then I would send the barrel back. It may be safe to fire, but at this point the barrel may wear (headspace) so it fails the Max chamber gage before the bore/throat/muzzle is worn out. There is also a .001” difference between the 223 REM and 556 NATO Go gages that is not an issue here since your weapon failed a No-go gage. |
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