Cooper Arms Model 56 Classic in 300 Winchester Magnum. The Model 56 magnum action in 300 Win Mag is the most practical Cooper magnum configuration — the most popular magnum cartridge in a purpose-built magnum action with Cooper's sub-half-MOA guarantee. Classic oil-finish walnut stock keeps this from being a purely tactical offering. For the elk and moose hunter who wants the best production rifle their budget can buy. Type: Rifle Action: Bolt-Action Caliber: 300 Winchester Magnum Capacity: 1 Year introduced: 1993, USA Weight: 68 oz Overall length: 45" Status: Active Intended use: hunting