Peterson Cartridge Unprimed Rifle Brass Features The Peterson Cartridge unprimed rifle brass is produced for the .338 Weatherby RPM cartridge giving reloaders a match grade case to build their own precision loads around. Each case is sized for a large rifle primer so reloaders will need to select primers separately as part of their loading process. Peterson s match grade standard is applied throughout manufacturing from small batch production runs through quality control aiming for consistency that reloaders can rely on load after load. This attention to detail is meant to help shooters maintain accuracy standards all the way from the reloading bench to the target. Because this brass is reloadable careful reloaders can expect to get multiple firings out of each case when following proper reloading practices and pressure guidelines. The unprimed condition means reloaders have full control over primer selection to match their specific load development goals. This brass is sold strictly as a reloading component and is not a finished loaded cartridge ready to fire out of the box. For handloaders working up .338 Weatherby RPM loads Peterson Cartridge unprimed rifle brass is available for sale at GrabAGun. Peterson Cartridge Unprimed Rifle Brass Specifications Manufacturer: Peterson Cartridge Caliber: .338 Weatherby RPM Primer Size: Large Rifle Reloadable: Yes Available At: GrabAGun