Cooper Arms Model 52 Western Classic in 7mm Remington Magnum. The 7mm Rem Mag, introduced by Remington in 1962, became America's most popular magnum hunting cartridge almost immediately. Cooper's Model 52 handles the belted magnum case with authority, and the Western Classic treatment — AAA Claro walnut, case-color metalwork — elevates what is already a capable elk and long-range deer cartridge into a genuine heirloom. Type: Rifle Action: Bolt-Action Caliber: 7mm Remington Magnum Capacity: 1 Year introduced: 1991, USA Weight: 66 oz Overall length: 45" Status: Active Intended use: hunting