Hornady Frontier .223 Remington 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo 20 Rounds. 56 NATO 300 Blackout and 6.5 Grendel. Applications range from plinking target shooting and hunting to law enforcement training and self-defense. Buy Hornady ammo to get bullets that are accurate consistent and always dependable. Specifications for Hornady Frontier .223 Remington 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammunition: Manufacturer: Hornady Caliber: .223 Remington Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 55 grain Cartridge Case Material: Brass Muzzle Velocity: 3240 ft/s Muzzle Energy: 1282 ft-lbs Application: All Purpose Package Type: Box Primer Style: Centerfire Sectional Density: 0.157 G1 Ballistic Coefficient: 0.243 Features of Hornady Frontier .223 Remington 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammunition: Consistency In Every Cartridge: State-of-the-industry loading techniques and quality control procedures ensure the reliability of every Frontier Cartridge round. Rounds For All Applications: Frontier Cartridge offers ammunition configured for a wide range of shooters and applications everything from plinking target shooting and hunting to law enforcement training and self-defense. Brass Cases: In addition to Hornady target friendly non-steel core bullets in a variety of offerings Frontier Cartridge features brass cartridge cases and military-grade boxer primers and propellant. Package Contents: Hornady Frontier .223 Remington 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammunition What is Hornady Frontier .223 Remington 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammunition good for? The manufacturer thinks that it is best for all purpose.Hornady FR100: Frontier .223 Remington 55 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo 20 Rounds