Lapua 338 Norma Magnum Rifle Brass 100 Piece. 416 Rigby case the 338 Norma Magnum was developed by J. Sloan and D. Kiff as a long-range sporting cartridge. Norma adopted the design and standardized it with CIP in 2010. The US military has spurred the development some machineguns chambered for the .338 Norma which would be capable of providing superb long-range shooting capability. With Lapuas unmatched standard of quality handloaders will find our .338 Norma Magnum cases a choice for ELR and other extreme long-range shooting applications. Specifications for Lapua 338 Norma Magnum Rifle Brass: Manufacturer: Lapua Caliber: .338 Norma Magnum Brass Quantity: 100 Piece Package Contents: Lapua 338 Norma Magnum Rifle Brass Lapua 4PH8090C: 338 Norma Magnum Rifle Brass 100 Piece