Type Rifle Designed 1993 Case type Rimless, Bottleneck | Place of origin United States Parent case New Design Bullet diameter 0.585 in (14.9 mm) | |
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The .577 Tyrannosaur or .577 T-Rex (14.9×76mm) is a very large and extremely powerful rifle cartridge developed by A-Square in 1993 for professional guides who escort clients hunting dangerous game. The cartridge is designed for use in "stopping rifles": A rifle intended to stop the charge of dangerous game. The 577 contains a .585-inch (14.9 mm) diameter 750-grain (49 g) Monolithic Solid Projectile which when fired moves at 2,460 ft/s (750 m/s) producing 10,180 foot-pounds force (13,800 J) of muzzle energy. The production model from A-square is based on their Hannibal rifle.
References
.577 Tyrannosaur Wikipedia(Text) CC BY-SA