Fiocchi Hyperformance Defense 5.7x28mm 40grain Tipped Hollow Point Brass Cased Pistol Ammo 50 Rounds. 7x28mm stands ready. The 40-grain projectile exhibits deep penetration and reliable performance. It also features a polymer tip to ensure proper feeding and delivers the perfect balance of exceptional ballistic and terminal performance. Specifications for Fiocchi Hyperformance Defense 5.7x28mm 40grain Tipped Hollow Point (THP) Brass Cased Pistol Ammunition: Manufacturer: Fiocchi Caliber: 5.7x28mm Number of Rounds: 50 Bullet Type: Tipped Hollow Point (THP) Bullet Weight: 40 grain Cartridge Case Material: Brass Muzzle Velocity: 2100 ft/s Muzzle Energy: 390 ft-lbs Application: Personal Defense Package Type: Box Primer Style: Centerfire Lead Free: No Package Contents: Fiocchi Hyperformance Defense 5.7x28mm 40 Grain Tipped Hollow Point Brass Cased Pistol Ammunition Fiocchi 57PT40: Hyperformance Defense 5.7x28mm 40 Grain THP Brass Cased Pistol Ammo 50 Rounds