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A-Square developed the .577 Tyrannosaur or .577 T-Rex in 1993 for the use in dangerous game hunts. Professional guides in Zimbabwe and other countries quickly adopted this cartridge do to it’s “stopping” power and ability to take down dangerous game when charging.
The .577 T-Rex production model is base on the Hannibal rifle and it weighs in at 13.6 pounds. It is capable of propelling a .585 in. dia. 750 gr bullet at 2,366 fps with 9,327 ft.-lbs. of energy. There are many load variables that will offer different velocities and energy.
from the Roberson Cartridge Company site. They make/sell the brass.
A-Square developed the .577 Tyrannosaur or .577 T-Rex in 1993 for the use in dangerous game hunts. Professional guides in Zimbabwe and other countries quickly adopted this cartridge do to it’s “stopping” power and ability to take down dangerous game when charging.
The .577 T-Rex production model is base on the Hannibal rifle and it weighs in at 13.6 pounds. It is capable of propelling a .585 in. dia. 750 gr bullet at 2,366 fps with 9,327 ft.-lbs. of energy. There are many load variables that will offer different velocities and energy.
from the Roberson Cartridge Company site. They make/sell the brass.
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