PMC's X-Tac M855 sends a 62-grain steel-core projectile downrange at 2920 fps, generating 1174 ft-lbs of muzzle energy. That velocity is on the lower end for M855 loads. Winchester runs 3060 fps and Armscor hits 3020 fps with the same bullet weight. But PMC built this round to mil-spec M855 standards, complete with the distinctive green-painted steel penetrator tip. The LAP (Light Armor Piercing) designation means it handles intermediate barriers better than any standard FMJ load in the 5.56 NATO lineup.

The steel penetrator core is what separates M855 from basic ball ammunition. Standard 62-grain FMJ rounds rely entirely on lead and copper for their terminal effect. The X-Tac adds a hardened steel insert ahead of the lead core that maintains structural integrity through automotive glass, sheet metal, and wooden barriers. This matters for shooters who train for realistic defensive scenarios. A G1 ballistic coefficient of 0.243 is modest compared to boat-tail match loads, but it gets the job done for practical training distances inside 300 yards.

High-volume range sessions and carbine courses are the primary home for this ammunition. PMC's South Korean manufacturing produces consistent rounds that cycle through AR-15 and M4-pattern rifles without issue. The moderate 2920 fps velocity keeps felt recoil manageable during rapid-fire drills. One real limitation: many indoor ranges and some outdoor facilities ban green tip ammunition because the steel core damages backstops and steel targets. Check your range rules before packing these for a session. For outdoor training on dirt berms, this is a solid option that delivers authentic M855 capability.