ATA Arms Romanian NATO Spec 5.56x45mm NATO 55gr, FMJ, 20rd per Box 40 Boxes per Case

ATA Arms Romanian NATO Spec 5.56x45mm NATO 55gr, FMJ, 20rd per Box 40 Boxes per Case

These NATO Spec M193 rifle cartridges have a sealed primer & bullet and are good for multiple applications.

NATO Specifications:
Parent cartridge .223 Remington
Case type Rimless, bottleneck, brass
Bullet diameter 5.70 mm (0.224 in)
Neck diameter 6.43 mm (0.253 in)
Shoulder diameter 9.00 mm (0.354 in)
Base diameter 9.58 mm (0.377 in)
Rim diameter 9.60 mm (0.378 in)
Rim thickness 1.14 mm (0.045 in)
Case length 44.70 mm (1.760 in)
Overall length 57.40 mm (2.260 in)
Case capacity 1.85 cm3 (28.5 gr H2O)
Rifling twist 178 mm or 229 mm (1 in 7 in or 9 in, originally 1 in 14 in)
Primer type Small rifle
Maximum pressure (EPVAT) 430.00 MPa (62,366 psi)
Maximum pressure (SCATP 5.56) 380.00 MPa (55,114 psi)

Ballistic performance
Bullet weight/type Velocity Energy
4 g (62 gr) SS109 FMJBT 940 m/s (3,100 ft/s) 1,767 J (1,303 ft·lbf)
4.1 g (63 gr) DM11 FMJBT 936 m/s (3,070 ft/s) 1,796 J (1,325 ft·lbf)
4.1 g (63 gr) GP 90 FMJBT 905 m/s (2,970 ft/s) 1,679 J (1,238 ft·lbf)

• Caliber : 5.56x45mm NATO
• Bullet Type : Full Metal Jacket (FMJ)
• Bullet Weight : 55 gr
• Rounds Per Box : 20
• Boxes Per Case : 40