Federal Premium 9 mm Luger 124 Grain Hydra-Shok Jacketed Hollow Point Brass Centerfire Pistol Ammo 20 Rounds. Hydra-Shock experts at Federal Premium have engineered the round's notched copper jacket to initiate and control expansion as well as amazing greater penetration giving shooters the confidence they need in the event of self-defense situations. Their ballistic coefficients ogive shape and ridged section provide the optimum platform for the design's center post to achieve the optimum impact velocity. Give yourself the peace of mind you'll need to overcome an armed adversary using Federal Personal Defense 9mm 124 grain Hydra-Shok JHP Brass Cased Centerfire Pistol Ammunition. Specifications for Federal Premium 9 mm Luger 124 Grain Hydra-Shok Jacketed Hollow Point Brass Casing Centerfire Pistol Ammunition: Manufacturer: Federal Caliber: 9mm Luger Number of Rounds: 20 Bullet Type: Hydra-Shok Jacketed Hollow Point Bullet Weight: 124 grain Cartridge Case Material: Brass Muzzle Velocity: 1120 ft/s Muzzle Energy: 345 ft-lbs Application: Self-Defense Package Type: Box Primer Style: Centerfire Lead Free: No Barrel Length: 4 in Gun Type: Pistol Features of Federal Premium 9 mm Luger 124 Grain Hydra-Shok Jacketed Hollow Point Brass Casing Centerfire Pistol Ammunition: Superb accuracy and overall ballistic performance Hydra-Shok bullet's notched copper jacket initiates and controls expansion Center-post hollow-point design provides reliable expansion Package Contents: Federal Premium 9 mm Luger 124 Grain Hydra-Shok Jacketed Hollow Point Brass Casing Centerfire Pistol Ammunition Federal P9HS1: Premium 9 mm Luger 124 Grain Hydra-Shok Jacketed Hollow Point Brass Centerfire Pistol Ammo 20 Rounds