Can Ammunition Get Wet?

Firearms and ammunition are not intended to be subjected to total immersion in water. They are very susceptible to moisture damage, especially metal parts that will sustain rust when moisture is left untreated.

Are bullets watertight?

Some people might tell you that ammunition is mostly “waterproof”, so it's all right to wipe it dry and reuse it. ... Once moisture has gotten through ammo, the primer or gunpowder inside it may have already been compromised. Here are some problems you may have with using wet ammo: Wet Ammo Will Rust.

What happens if you put bullets in water?

Water is 800% more dense than air, so unlike a bullet fired above the surface, once the bullet hits the water it immediately begins slowing down, the Science Channel explains. And instead of barreling towards Wahl, the bullet slows and falls to the bottom of the pool.