![]() 450 Nitro Express cartridge by John Rigby & Company in 1898, similar conversions of Black Powder Express cartridges to Nitro Express were made, including the. 600 Nitro Express cartridge.įollowing the successful development of the. 600/570 JDJ by straightening the taper to accept the. The cartridge was also the basis for the. 585 Nyati cartridge, by blowing out the casing's straight walls to allow formation of enough of a shoulder for headspace purposes, making it essentially rimless. 577 Nitro Express was also used as the parent case for the. The 3¼ inch cartridge is based on the 3¼ inch. ![]() Like the 2¾ inch cartridge, it fires a 750 grain bullet, but this time at a muzzle velocity of 2,050 feet per second with a muzzle energy of up to 7,010 ft-lbf. The 3 inch cartridge is based on the 3 inch. 577 Black Powder Express case, firing a 750 grain (49 grams) bullet at a muzzle velocity of 1,800 feet per second with a muzzle energy of 5,400 ft-lbf. The 2¾ inch cartridge is based on the 2¾ inch. 577 Black Powder Express cartridge with cordite-based loadings made in the 2¾ inch, 3 inch, and 3¼ inch case lengths.
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March 2023
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