Winchester Win Ammo Defender .223 Rem. 64gr. Bonded 20 pack. 56 provides the ideal balance between expansion retained weight and penetration in personal defense situations. Specifications for Winchester Win Ammo Defender .223 Rem. 64gr. Bonded: Manufacturer: Winchester Caliber: .223 Remington Number of Rounds: 20 Bullet Type: Jacketed Soft Point (JSP) Bullet Weight: 64 grain Cartridge Case Material: Brass Muzzle Velocity: 2800 ft/s Muzzle Energy: 1115 ft-lbs Application: Personal Defense Self-Defense Package Type: Box Primer Style: Centerfire Lead Free: No Gun Type: Rifle Package Contents: Winchester Win Ammo Defender .223 Rem. 64gr. Bonded 20-pack What is Winchester Win Ammo Defender .223 Rem. 64gr. Bonded good for? The manufacturer thinks that it is best for self-defense personal defense.Winchester S556PDB: Win Ammo Defender .223 Rem. 64gr. Bonded 20 pack