Fiocchi Training Dynamics 223 Ammo Features Fiocchi Training Dynamics provides FMJ bullets in weights comparable to those found in Fiocchi s premium defense and target cartridges to ensure performance consistency between training sessions and the real thing all while keeping training costs to a minimum. Fiocchi Training Dynamics 223 Ammo Specifications Manufacturer: Fiocchi Model: Training Dynamics Caliber: .223 Rem Bullet Weight: 55 gr Rounds Per Box: 50 Casing Material: Brass Application: Match Range Target Bullet Type: Full Metal Jacket Boat-Tail (FMJBT) Muzzle Energy: 1282 ft lbs Muzzle Velocity: 3240 fps