Military-style semi-auto rifles seldom have firing pin retraction springs. If care is not used in assembling ammunition, a “slam-fire” can occur before the bolt locks. The military arsenals accomplish this using different techniques and components including different primer sensitivity specifications from their commercial counterparts. CCI makes rifle primers for commercial sale that matches military sensitivity specs that reduce the chance of a slam-fire when other factors go out of control*. If you’re reloading for a military semi-auto, look to CCI Military primers.

Mil-spec sensitivity

Initiator mix optimized for ball/spherical propellants

Available in large (No.34) and small (No. 41) rifle

Use the same data as CCI Magnum primers

Military-Style Semi-Automatic Rifles