How deep does a 5.56 NATO penetrate Ballistic Gel 10%?

At the muzzle, a representative 5.56 NATO load penetrates approximately 544 mm (21.4 inches) into ballistic gel 10%.

What is the impact energy of a 5.56 NATO?

This 5.56 NATO load carries about 1693 joules (1249 ft-lb) at the muzzle.

Over-penetrates (21″ vs 18″ FBI maximum)

Penetration depth

544 mm (21.4″)

Impact velocity

920 m/s (3018 fps)

Muzzle energy

1693 J (1249 ft-lb)

Bullet behaviour

Intact

Fired at the muzzle, a representative 5.56 NATO load (4 g, FMJ, 920 m/s) reaches roughly 544 mm (21.4 inches) into ballistic gel 10%.

10% ordnance gelatin is the FBI reference medium; 12–18 in (305–457 mm) is the accepted penetration window.