Founded in Pittsburgh Pennsylvania, Peterson Cartridge strives to created not only quality brass casings, but the most precise and consistent casings on the market. Each casing is inspected to ensure that it meets the high quality control standards of Peterson Cartridge. This a Bulk Box (250) of .388 Lapua Magnum Unprimed Brass Casings Peterson .338 Lapua Casings Bulk Box of 250 40005-P