.577 Tyrannosaur

The .577 Tyrannosaur or .577 T-Rex (14.9×76mm) is a very large and powerful rifle cartridge developed by A-Square in 1993 on request for professional guides in Zimbabwe who escort clients hunting dangerous game. The cartridge is designed for use in "stopping rifles" intended to stop the charge of dangerous game. The cartridge contains a .585 in diameter 750 gr monolithic solid projectile which when fired moves at 2460 ft/s producing 10180 ft.lbf of muzzle energy. The production model from A-square is based on their Hannibal rifle.