How deep does a .40 S&W penetrate Ballistic Gel 10%?

At the muzzle, a representative .40 S&W load penetrates approximately 759 mm (29.9 inches) into ballistic gel 10%.

What is the impact energy of a .40 S&W?

This .40 S&W load carries about 527 joules (388 ft-lb) at the muzzle.

Over-penetrates (30″ vs 18″ FBI maximum)

Penetration depth

759 mm (29.9″)

Impact velocity

300 m/s (984 fps)

Muzzle energy

527 J (388 ft-lb)

Bullet behaviour

Intact

Fired at the muzzle, a representative .40 S&W load (11.7 g, FMJ, 300 m/s) reaches roughly 759 mm (29.9 inches) into ballistic gel 10%.

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