The .577 Tyrannosaur or .577 T-Rex (14.9×76mm) is a very large and powerful rifle
cartridge developed by
A-Square
A-Square Company, LLC was a manufacturer of rifles, ammunition and bullets based in Chamberlain, South Dakota in the United States. The company was one of 19 that are members of the Sporting Arms and Ammunition Manufacturer's Institution (SAAMI ...
in 1993 on request for professional guides in
Zimbabwe
Zimbabwe (), officially the Republic of Zimbabwe, is a landlocked country located in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Botswana to the south-west, Zambia to the north, and ...
who escort clients hunting dangerous game. The cartridge is designed for use in "stopping rifles" intended to stop the charge of dangerous game. The 577 contains a diameter monolithic solid projectile which when fired moves at producing of
muzzle energy
Muzzle energy is the kinetic energy of a bullet as it is expelled from the muzzle of a firearm. Without consideration of factors such as aerodynamics and gravity for the sake of comparison, muzzle energy is used as a rough indication of the des ...
.
The production model from A-square is based on their Hannibal rifle.
References
External links
Video of Arthur Alphin talking with David Petzal about the A-Square .577 T-Rex
Pistol and rifle cartridges
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