Peterson PCC7MMRM250 7 mm Rem Mag Bulk Box of 250 Peterson Cartridge is a company based in Pittsburgh, Pennsylvania that specializes in producing high-quality brass casings. The company's goal is to produce the most precise and consistent casings available, and each casing is thoroughly inspected to meet the company's high-quality control standards. The product mentioned is a bulk box of 250 unprimed brass casings for 7mm Remington Magnum caliber. Peterson 7 mm Rem Mag Bulk Box of 250 PCC7MMRM250