5.56 x 45 mm SS109

30 round retail box
720 round retail can

 

 

 

Description 5.56 x 45 mm SS109
Bullet Weight (grains) ~62
Bullet Length (inches) 0.91 (+/- 0.01)
Cartridge Weight (grains) ~193
Cartridge Length (inches) 2.26 (- 0.03)
Mean Pressure (psi) Max. 55,130 (NATO)
Velocity (fps at 78 feet) ~3,000
Accuracy (mean radius (in) at 328 ft) Max. 0.87
Bullet Material Jacket: Gilding Metal (Brass)                                                                   Core: Steel and Lead-Antimony Alloy
Case Material Brass
Primer 5.56 mm Primer, Boxer
Powder (grains) Ball Powder, ~26