Freedom Arms Model 83 in 500 Wyoming Express — a cartridge developed by Freedom Arms and Wyoming Armory specifically for the Model 83 platform. Pushes 440-grain bullets at 1,350 fps for elephant-class energy levels in a revolver. Type: Revolver Action: Single-Action Caliber: 500 Wyoming Express Capacity: 5 Year introduced: 2006, USA Weight: 58 oz Overall length: 12" Status: Active Intended use: Hunting