Peterson Cartridge Brass Features The Peterson Cartridge brass for .338 WBY RPM is manufactured to a match-grade standard held throughout the entire production process ensuring consistent case wall thickness uniform case capacity and reliable primer pocket dimensions from case to case. This level of consistency directly translates into more repeatable handloads since variations in brass quality are one of the most common sources of inconsistent velocity and accuracy at the reloading bench. Reloaders working with the relatively specialized .338 Weatherby RPM cartridge benefit from a dedicated brass source built specifically to that chamber s dimensions. Packed in bulk 250-count quantities this brass suits handloaders who process large batches of ammunition for hunting long-range competition or high-volume practice. Maintaining that match-grade standard all the way to the target means shooters can trust their handloads to perform consistently shot after shot rather than chasing variations introduced by inferior brass. For reloaders serious about extracting maximum accuracy from their .338 Weatherby RPM rifle Peterson Cartridge brass provides the dependable foundation that precision handloading requires. Peterson Cartridge Specifications Brand: Peterson Cartridge Caliber: .338 WBY RPM Material: Brass Firearm Type: Rifle Quantity: 250 Available At: GrabAGun