Fiocchi Range Dynamics 556 NATO 55 Grain FMJ Brass Cased Rifle Ammo 50 Round. High-volume shooters appreciate this and we strive in our craft by never compromising our quality standards with options that will suit your needs. Specifications for Fiocchi Range Dynamics 556 NATO 55 Grain FMJ Brass Cased Rifle Ammunition: Manufacturer: Fiocchi Caliber: 5.56x45mm NATO Number of Rounds: 50 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 55 grain Cartridge Case Material: Brass Muzzle Velocity: 3250 ft/s Muzzle Energy: 1282 ft-lbs Application: Self-Defense Package Type: Box Primer Style: Centerfire Lead Free: No Package Contents: Fiocchi Range Dynamics 556 NATO 55 Grain FMJ Brass Cased Rifle Ammunition What is Fiocchi Range Dynamics 556 NATO 55 Grain FMJ Brass Cased Rifle Ammunition good for? The manufacturer suggests that it is good for self-defense.Fiocchi 556M193L: Range Dynamics 556 NATO 55 Grain FMJ Brass Cased Rifle Ammo 50 Round