Holland & Holland Royal double rifle in .500 NE with 24-inch barrels. The H&H Royal is arguably the most famous double rifle design in existence, with a history stretching back to the Victorian era of African exploration. Type: Rifle Action: Double Rifle Caliber: .500 Nitro Express Capacity: 2 Year introduced: 1885, UK Weight: 192 oz Overall length: 41" Status: Active Intended use: African Dangerous Game, Safari, Heritage Collecting