More ammo, lighter weight, easier swing radius and control.all fine points.that I have heeded and passed onto to other. Well Travis.i see you're still teaching the same lessons on the 5.56 you taught your's truly last year. manufactured commercial firearms with military chambers are the Colt AR-15 series, the Ruger Mini-14 and Ruger No. Imported ammunition of that type is generally loaded to standard military levels and should be fired only in firearms with military dimensioned chambers. government agencies and private security firms under contract to provide security for U.S. Ammunition certified to meet Mil-C-9963F (the military specification for M193 Ball) is only available to U.S. manufactured paramilitary ammunition intended for civilian consumption is purposely loaded down to SAAMI pressure levels and bullets are often seated deeper to accommodate the SAAMI chamber. When military ammunition is fired in the SAAMI chamber, pressures may rise to 55,000 or 60,000 CUP! U.S.
223 ammunition specify an average chamber pressure of 52,000 CUP. Chamber pressures can rise dramatically when military ammunition is fired in them. The SAAMI chamber used in sporting firearms has a smaller diameter bullet seat, a shorter throat and less free bore than military chambers. "Paramilitary 5.56mm ammunition should not be fired in commercial rifles with chambers reamed to SAAMI specifications. But, most ARs, especially from Colt and Bushmaster, are 5.56 NATO. "I read the 5.56 has slightly higher pressures and that if your barrel isn't stamped 5.56 you should not use the NATO round but stick with the.
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