The 600 Nitro Express, firing a 900-grain bullet at approximately 1950 fps, is the most powerful double-rifle cartridge ever standardized and the Holland & Holland Royal in 600 NE is among the rarest of all English sporting firearms. Originally developed at the request of colonial hunters who demanded the ultimate in stopping power for elephant, these rifles weigh upward of 16 pounds and are almost never fired offhand. Holland & Holland produces perhaps one or two per decade on bespoke commission. Type: Rifle Action: Double / SxS Caliber: 600 Nitro Express Capacity: 2 Year introduced: 1903, United Kingdom Weight: 288 oz Overall length: 46" Status: Active Intended use: Dangerous Game