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Old 12-04-2012, 21:06   #18
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Originally Posted by Big Bird View Post
There's only so much you can do in terms of designing a semi-auto rifle around a cartridge that will push 60,000 PSI.
5.56 NATO is around 60,000 psi and SAAMI .223rem is 55,000psi.
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Last edited by Travclem; 12-04-2012 at 21:09..
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