Fiocchi Range Dynamics 5.7X28mm 41/62 Grain FMJ Brass Cased Rifle Ammo Bulk Pack 400 Round. Specifications for Fiocchi Range Dynamics 5.7X28mm 41/62 Grain FMJ Brass Cased Rifle Ammunition: Manufacturer: Fiocchi Caliber: 5.7x28mm Number of Rounds: 400 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: .41 grain Cartridge Case Material: Brass Muzzle Velocity: 1050 ft/s Application: Self-Defense Package Type: Box Primer Style: Centerfire Lead Free: No Package Contents: Fiocchi Range Dynamics 5.7X28mm 41/62 Grain FMJ Brass Cased Rifle Ammunition Fiocchi 57COMSUB: Range Dynamics 5.7X28mm 41/62 Grain FMJ Brass Cased Rifle Ammo Bulk Pack 400 Round