Federal Premium Centerfire Handgun Ammunition 9 mm Luger 147 grain Hydra-Shok Jacketed Hollow Point Centerfire Pistol Ammo 20 Rounds. Most security agencies use and appreciate the efficiency and quality of this ammunition. This is simply because of the many advantages that it has compared with other ammunitions. This ammunition has an excellent way of delivering controlled expansion. It also has a unique way of penetrating through barriers which gives it better penetration ability. The following components give these bullets an edge over other competitors: Hydra-Shock and expanding full metal jacket which provides energy efficiency. Specifications for Federal Premium Centerfire Handgun Ammunition 9 mm Luger 147 grain Hydra-Shok Jacketed Hollow Point Centerfire Pistol Ammunition: Manufacturer: Federal Caliber: 9mm Luger Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 147 grain Cartridge Case Material: Brass Muzzle Velocity: 1000 ft/s Muzzle Energy: 326 ft-lbs Application: Self-Defense Package Type: Box Included Accessories: None Primer Style: Centerfire Lead Free: No Features of Federal Premium Personal Defense 9 mm Luger 147gr. Hydra-Shok JHP Pistol Ammo - 20 Rounds 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 Personal Defense 9 mm Luger 147gr. Hydra-Shok JHP Pistol Ammo - 20 Rounds Federal Premium P9HS2: Personal Defense Pistol Ammo 9 mm Luger Hydra-Shok Jacketed Hollow Point 147 grain 20 Rounds