Norma Dedicated Components .300 AAC Blackout Rifle Brass Cartridge Cases 50 Rounds. Cartridge cases are an important factor in this reputation. Superior quality ensures a long life and many reloads. Norma cases are made of the best possible raw materials with the narrowest tolerances and they deliver accuracy round after round. Specifications for Norma Dedicated Components .300 AAC Blackout Rifle Brass Cartridge Cases: Manufacturer: Norma Gun Type: Rifle Caliber: .300 AAC Blackout Quantity: 50 Per Box Fabric/Material: Brass Brass Quantity: 50 Piece Package Contents: Norma Dedicated Components .300 AAC Blackout Rifle Brass Cartridge Cases Norma 20275062: Dedicated Components .300 AAC Blackout Rifle Brass Cartridge Cases 50 Rounds