Peterson Cartridge 7mm BR Brass Rifle Brass Casing Bulk 500 Count Box. From small batch production lines to quality control department to your bench and on to the range. Match-grade is the standard that we strive to achieve so that our customers can maintain that standard all the way to the target. Specifications for Peterson Cartridge 7mm BR Brass Rifle Brass Casing: Manufacturer: Peterson Cartridge Gun Type: Rifle Caliber: 7mm BR Remington Fabric/Material: Brass Package Contents: Peterson Cartridge 7mm BR Brass Rifle Casing Peterson Cartridge 40044-P: 7mm BR Brass Rifle Brass Casing Bulk 500 Count Box