Peterson Cartridge Unprimed Rifle Brass Features The Peterson Cartridge Unprimed Rifle Brass is manufactured to a match grade standard a designation the company maintains through every stage of production from small batch manufacturing lines through a dedicated quality control department. This brass is chambered for the .257 Weatherby cartridge and is designed to accept large rifle primers giving the reloader complete control over primer selection and seating depth. As unprimed reloading components these cases are intended strictly for handloaders building their own ammunition not for use as loaded rounds. The consistency Peterson builds into each case is intended to carry through to the reloading bench and ultimately to performance on target. Because each case begins its life on a small batch production line Peterson is able to maintain tighter tolerances than typical mass production brass manufacturing allows. The reloadable design of this brass means it can be used repeatedly through multiple firing and reloading cycles offering good long term value for dedicated handloaders. Sold in a 50 count box this brass gives the reloader a substantial quantity to work with for load development or volume reloading. For handloaders seeking dependable match grade .257 Weatherby brass Peterson Cartridge Unprimed Rifle Brass is available for sale at GrabAGun. Peterson Cartridge Unprimed Rifle Brass Specifications Manufacturer: Peterson Cartridge Caliber: .257 WBY Primer Size Type: Large Rifle Reloadable Case: Yes Count: 50-Count Available At: GrabAGun