Hydrashok
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Hydra-shok is a brand of ammunition made by Federal Cartridge Co. It was originally patented by Upstate NY bullet designer Tom Burczynski. Hydra-Shok® features a unique, patented center-post design and notched jacket. The center post acts as a simple wedge when tissue enters the hollow point resulting in maximal expansion of the bullet, and improved energy transfer. The Hydra-Shok® round is available in various calibers.