The 5.56×45mm NATO SS109/M855 cartridge (NATO: SS109; U.S.: M855) with standard 62 gr. lead core bullets with steel penetrator will penetrate about 38 to 51 cm (15 to 20 in) into soft …

2010年11月26日 · The Army's solution is the new M855A1 Enhanced Performance Round (EPR). This round offers better performance than the M855 against all targets likely to be engaged …

2024年6月13日 · It was a prototype of the 5.56mm rifle that would become the U.S. Army M-16. A few companies started putting an “X” in front of the name, changing it to XM855, basically just …

2014年5月21日 · The U.S. Army replaced its green-tipped 5.56x45 mm NATO, M855 standard ball cartridge in June 2010 with the lead-free, or “green,” M855A1 cartridge. Like its …

The M855A1, a 5.56 mm Ball ammunition, is an enhanced performance round for today’s combat and training environments. It works with the M4 Carbine, the M249 machine gun, and the H&K …

2024年10月4日 · The M855 has an average chamber pressure of 51,522 psi, which is within the 52-55,000 psi range the M4 and all 5.56mm military rifles are designed. The M855A1 is …

The focus of this report is the M855 ammunition, specifically, the R011 reference lot (figure 3). The key dimensional and physical characteristics of the M855 ammunition are listed in table 1 …

2011年5月6日 · 2 / 4 Jim Newill explains the effectiveness of the Army's 5.56mm M855A1 Enhanced Performance Round fired from an M4 Carbine against a 3/8 inch mild steel plate, …

2014年5月28日 · The M855A1 cartridge is the Army’s fourth version of a lead-free 5.56 mm projectile, capping a 15-year effort that quite likely consumed $100 million.

A true general purpose round optimized to a wide array of targets Significantly improved hard target performance at longer distances Provides consistent performance against soft targets …