Mark V Ultramark in 300 Wby Mag. AAA Fancy walnut, oil finish, contrasting wood inlays, high-grade checkering, Pachmayr pad. The 300 Wby Mag Ultramark is the most powerful standard-lineup Weatherby proprietary chambering in the premium walnut Ultramark dress. Type: Rifle Action: Bolt-Action Caliber: 300 Wby Mag Capacity: 3 Year introduced: 1988, USA Weight: 180 oz Overall length: 46.5" Status: Active Intended use: Hunting, Collector