Hydra-Shok

Hydra-Shok was released in 1988 after the FBI requested a bullet with better terminal ballistics than traditional cup and core projectiles.

[1] The Hydra-Shok bullet features a hollow-point construction which contains a distinctive central post in the base of the hollow.

This design makes such bullets easily identifiable in autopsy examinations of gunshot victims.

[2] The manufacturer stated that the scored jacket and center post design provide a "programmed" expansion.

There has been much debate regarding the bullet's unreliable expansion when fired through clothing or media other than ballistic gelatin.