Federal Premium 223 Rem 77 Grain Centerstrike Centerfire Rifle Ammo 20 Rounds. This Federal Ammunition features Open Tip Match (OTM) bullets that deliver powerful stopping power immaculate accuracy and predictability. With premium brass cases packed with open tip match (otm) bullets you ll deliver optimal results for target. With great promotions on Ammunition and other high-quality rifle ammo from trusted brands like Federal you re sure to find the perfect firepower for your next outdoor adventure or training session. Stock up today to save big on ammo and other top-tier tactical hunting and outdoor gear at OpticsPlanet. Specifications for Federal Premium 223 Rem 77 Grain Centerstrike Centerfire Rifle Ammunition: Manufacturer: Federal Caliber: .223 Remington Number of Rounds: 20 Bullet Type: Open Tip Match (OTM) Bullet Weight: 77 grain Cartridge Case Material: Brass Muzzle Velocity: 2720 ft/s Muzzle Energy: 1265 ft-lbs Application: Target Primer Style: Centerfire G1 Ballistic Coefficient: 0.356 Package Contents: Federal Premium 223 Rem 77 Grain Centerstrike Centerfire Rifle Ammunition What is Federal Premium 223 Rem 77 Grain Centerstrike Centerfire Rifle Ammunition good for? The manufacturer suggests that it is suitable for target.Federal GM223OTM3: Premium 223 Rem 77 Grain Centerstrike Centerfire Rifle Ammo 20 Rounds