Peterson Cartridge Unprimed Rifle Brass Features The Peterson Cartridge Unprimed Rifle Brass for .338 Lapua Magnum is manufactured to a match-grade standard applied consistently from Peterson s small batch production lines through its quality control department. Multiple quality inspections are performed on each case before it ships intended to identify any inconsistency that could compromise case life or accuracy at the long ranges this cartridge is typically used for. The mouth and neck are annealed to promote even neck tension across repeated firings a detail that matters significantly for a magnum cartridge pushed to the pressures and velocities .338 Lapua loads demand. A beautifully polished finish on each case reflects the same attention to detail found throughout the rest of Peterson s production process. As unprimed brass these cases give long-range and precision reloaders complete control over primer selection to match their specific load development typically a large rifle primer for this cartridge s pressure range. That flexibility lets shooters fine-tune their .338 Lapua loads around their particular rifle and intended use whether that is extreme long-range competition or big game hunting. Peterson s stated goal is to produce some of the most consistent accurate and durable brass rifle casings available a standard meant to carry through from the loading bench to the target. For precision reloaders working with .338 Lapua Magnum Peterson Cartridge Unprimed Rifle Brass is available for sale at GrabAGun. Peterson Cartridge Unprimed Rifle Brass Specifications Manufacturer: Peterson Cartridge Caliber: .338 Lapua Mag Material: Brass Firearm Type: Rifle Primer Size Type: Large Rifle Reloadable Case: Yes Rounds Per Box: 50 Available At: GrabAGun