5.56 x 45 mm - Factory Load Specifications

Bullet
Type Manufacturer +P +P+ NATO Velocity Energy Coefficient Length Sectional Density
55 gr Magtech 3,265 fps 1,302 ft lb 0.272 lb/in²
62 gr Magtech 3,085 fps 1,311 ft lb 0.340 lb/in²
77 gr Magtech 2,790 fps 1,331 ft lb 0.362 lb/in²