Enhanced Performance Round Brings More Capability to U.S. Soldiers




By Lt. Col. Jeffrey Woods, Product Manager for Small-Caliber Ammunition in the Office of the Project Manager Maneuver Ammunition Systems, Program Executive Office for Ammunition, at Picatinny Arsenal, N.J. He holds a B.S. in business administration from the University of Texas and a M.S. in operations research from the Florida Institute of Technology.

Earlier this summer, the Army began shipping a new 5.56mm cartridge to warfighters in Afghanistan called the M855A1 Enhanced Performance Round. And, as Soldiers normally do when any new product comes their way, the M855A1 has become a hot topic during their ritual debates on guns and ammo.

The new round replaces the current M855 5.56mm cartridge that has been used by U.S. troops since the early 1980s.

The M855A1 is tailored for use in the M-4 weapon system but also improves the performance of the M-16 and M-249 families of weapons. The M855A1 has shown improved hard-target capability, more dependable, consistent performance at all distances, improved accuracy, reduced muzzle flash and a higher velocity.


U.S. Army Spc. Francisco Jimenez, an infantryman assigned to Personal Security Detail, 4th Advise and Assist Brigade, 1st Cavalry Division, fires a round from an M4 carbine during marksmanship sustainment training in Mosul, Iraq, Sept. 29, 2010. The M4 Carbine is one of the weapons to which the M855A1 5.56mm Enhanced Performance Round is tailored. (U.S. Army photo by Private 1st Class Angel Washington/Released) The new M855A1 Enhanced Performance Round (EPR) offers better performance than the M855 against all targets likely to be engaged with small arms. (Photo: U.S. Army)

During testing, the M855A1 performed better than current 7.62mm ball ammunition against certain types of targets, blurring the performance differences that previously separated the two rounds. The projectile incorporates these improvements without adding weight or requiring additional training.

Overall, the Army fired more than 1 million rounds to ensure the new cartridge met or exceeded all expectations. I can honestly say that the M855A1 is without question the most thoroughly tested small caliber round ever fielded.

Additionally, the Enhanced Performance Round contains an environmentally-friendly projectile that eliminates up to 2,000 tons of lead from the manufacturing process each year in direct support of Army commitment to environmental stewardship. This is a clear example of how “greening” a previously hazardous material can also provide extremely beneficial performance improvements.

Picatinny Arsenal’s Project Manager for Maneuver Ammunition Systems manages the M855A1 program. We have plans to procure more than 200 million rounds throughout the next year.

For those ammunition enthusiasts who want to know the hard facts and details about why the round excels, I invite you to read an in-depth article I wrote for Army AL&T Magazine, Assistant Secretary of the Army for Acquisition, Logistics and Technology (ASAALT). It also includes charts and diagrams that illustrate the capabilities and performance of the new round.

Read “The Evolution of the M855A1 5.56mmm Enhanced Performance Round” by Lt. Col. Jeffrey K. Woods.

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