So everybody on here simply assumes that CFE223 powder is used only in a .223? Not one thing in the original question indicates that. Makes me shake my head.
Come on... he said plinking ammo for his AR with a 55gn campro fmj. The only bullet that matches is the 223 55 BT FMJ
Seriously, an AR with a 223 55 BT FMJ, IS going to be 223/5.56
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