Mili Ammunitions Custom Defense .223 Remington 55 Grain Full Metal Jacket Brass Cased Rifle Ammo 20 Rounds. From field work to range work their ammunition is built for everything you throw at it. Specifications for Mili Ammunitions Custom Defense .223 Remington 55 Grain Full Metal Jacket Brass Cased Rifle Ammunition: Manufacturer: Mili Ammunitions Caliber: .223 Remington Number of Rounds: 20 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 55 grain Cartridge Case Material: Brass Application: Self-Defense Package Type: Box Included Accessories: None Primer Style: Centerfire Package Contents: Mili Ammunitions Custom Defense .223 Remington 55 Grain Full Metal Jacket Brass Cased Rifle Ammunition What is Mili Ammunitions Custom Defense .223 Remington 55 Grain Full Metal Jacket Brass Cased Rifle Ammunition good for? The manufacturer says that it is good for self-defense.Mili Ammunitions M233-55-B: Custom Defense .223 Remington 55 Grain Full Metal Jacket Brass Cased Rifle Ammo 20 Rounds