Buy CCI Large Rifle 7.62mm NATO-Spec Military Primers #34 Online. CCI 7.62mm NATO-Spec Military Primers are a military big rifle primer that has a magnum priming mixture. The CCI #34 primers are an excellent option for military cartridge reloaders. These primers are designed to be more difficult to ignite, preventing slam fires in military-style rifles with a floating firing pin. All CCI primers undergo continual testing and enhancement. Consequently, CCI primers of today are more sensitive, simpler to seat, and compatible with progressive and automated loading equipment than ever before. Modern non-corrosive and mercury-free initiator mixtures are used for the cleanest possible burn.