223 Rem. They encouraged CCI (tougher primers) for all hundreds Employed in any firearm that has a totally free floating firing pin since the AR does. Other intelligent, they stated, it issues little and all big brand names will ignite with regard to the same. ninety nine/a thousand rate tags https://cesarrbozk.webbuzzfeed.com/32387847/not-known-facts-about-federal-m215-primers