Norma .264 Winchester Magnum Unprimed Rifle Brass 50 Cartridge Cases. The .264 Win. Mag is for all Winchester Magnums and popular worldwide for custom hand loads. A .264 neck is similar in size and cutout to the original and requires no resizing. However the neck of the case needs to be softer to accommodate the custom round being inserted. The shoulder and body of the case needs to be firmer to allow for the larger capacity and prevent wear from the recoil of heavy loads. Norma's strict quality control helps to ensure that this brass is nothing like the original. Specifications for Norma .264 Winchester Magnum Unprimed Rifle Brass: Manufacturer: Norma Gun Type: Rifle Caliber: .264 Winchester Magnum Primed: No Quantity: 1 Box Fabric/Material: Brass Brass Quantity: 50 Piece Package Contents: Norma .264 Winchester Magnum Unprimed Rifle Brass Norma 20268027: .264 Winchester Magnum Unprimed Rifle Brass 50 Cartridge Cases