How deep does a .22 LR penetrate Water?

At the muzzle, a representative .22 LR load penetrates approximately 1833 mm (72.2 inches) into water.

What is the impact energy of a .22 LR?

This .22 LR load carries about 142 joules (104 ft-lb) at the muzzle.

Penetrates to ~72″ before stopping

Penetration depth

1833 mm (72.2″)

Impact velocity

330 m/s (1083 fps)

Muzzle energy

142 J (104 ft-lb)

Bullet behaviour

Intact

Fired at the muzzle, a representative .22 LR load (2.6 g, FMJ, 330 m/s) reaches roughly 1833 mm (72.2 inches) into water.

Water is a dense fluid medium; bullets destabilise and shed velocity quickly.