Underwater rounds

These are examples of underwater rounds. The bottow one is a rocket projectile. The middle two are for a rifle. The lower one is a tracer (there is a pyrotechnic element in the base of the projectile that burns underwater that allows the shooter to observe the trajectory of the projectile). The topmost rounds are for a pistol. All of these share a common principle of creating a cavitation bubble at the tip of the projectile as it moves through the water. In this manner the projectile does not slow in the same way as if it were passing through water without the benefit of a air bubble.

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