Ruger No. 1 single-shot falling-block rifle in .375 H&H with a 23.25-inch barrel, quarter-rib rear sight, and Express front. The No. 1 Tropical is designed for African dangerous game hunting. Type: Rifle Action: Single-Shot Caliber: .375 H&H Magnum Capacity: 1 Year introduced: 1966, USA Weight: 9 oz Overall length: 39.75" Status: Active Intended use: Safari, Dangerous Game, Collector