Thread: 5.56 and .223
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Old September 15, 2012, 04:48 PM   #15
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Join Date: May 6, 2012
Location: Southeast Texas
Posts: 1,670
Guns are proof tested for twice the pressure their pressure limit rating I believe. I really have no use for shooting 5.56 in a fine 223. It just seems pointless, and crude to do this in a fine well tuned 223 rifle
Chambers and barrels are not engineered nor tested to have a factor of safety of 2 (max pressure/allowable pressure)**. That would use too much material, cost too much, and just be impractical to produce.

**most firearms, I am not going to say all as I am not sure about all firearms
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