Federal Premium Hydra-Shok has proven itself for self-defense since 1989. Hydra-Shok Deep builds off the time-tested platform with design improvements that better meet modern performance measurements. The bullet features a more robust center post and a core design that penetrate to optimal depths through the barriers most commonly encountered inself-defense situations. Our customers reside all across the country and are governed by numerous federal, state, county, city, and municipality regulations for these types of products. Please consult your area's laws and regulations governing this product and its use. | Federal Premium Ammunition Personal Defense .40 S&W 165 Grain Hydra-Shok Deep Ammo