In its rifle line, the company loaded a host of cartridges from .223 Rem. to .458 Lott, and in handgun ammunition, the .44 Rem. Mag. especially found favor with those living in, or destined for ...
.223 and 5.56x45 ammunition are nearly identical but there are a few subtle differences that may help you decide which caliber is best for you. Generally, if you own an AR-15 or other rifle chambered for 5.56x45, you can safely shoot .223 or 5.56 ammunition in your firearm without any trouble. Jul 23, 2005 · (Special note: Sample fired in a .223 chamber for uniformity of testing and the fact that many users fire this ammunition in .223 rifles.) Accuracy 10 rounds in two five-round groups were fired from a 1 in 12 twist, 20 inch, Wiseman v-block test barrel. 3 non-recorded foulers were used in each test.