H&H falling-block single-shot rifle in the most powerful sporting calibers. The .577 NE fires a 750-grain bullet at 2,050 fps for approximately 7,000 ft-lbs of muzzle energy. Single-shot falling-block format was popular for very heavy calibers where the action had to withstand extreme chamber pressures. H&H single-shot rifles are extremely rare. Type: Rifle Action: Single-Shot Caliber: .577 Nitro Express Capacity: 1 Year introduced: 1905, United Kingdom Weight: 104 oz Overall length: 43.5" Status: Discontinued Intended use: safari, collection