20/577 Alexander Henry

Rifle cartridge July 2018 July 2018 20/577 Alexander Henry Scotland Rifle Alexander Henry 1895 1895 20 bore Rimmed, bottleneck .584 .607 .674 .706 .754 .06 2.75 3.27 560 UNK UNK 570 1725 3770 The big game express &The Spanish Association of Cartridge Collectors The 20/577 Alexander Henry, also known as 20/577 Express, is an obsolete rifle cartridge. Overview The 20/577 Alexander Henry was developed and introduced by the Scottish gunmaker Alexander Henry around 1895 exclusively for his hunting rifles. The 20/577 Alexander Henry is a rimmed, bottlenecked centerfire rifle cartridge. The 20/577 Alexander Henry is derived from brass 20 bore cartridges necked down to accept a .584 in mm calibre bullet like the .577 Black Powder Express. The 20/577 Alexander Henry fired a 560 or 570 gr g lead, paper patched bullet driven by 6 drams (10.6 g) of blackpowder at 1725 ft/s m/s, its ballistic performance replicating that of the .577 Black Powder Express 3-inch. Later versions were loaded with mild loadings of cordite, carefully balanced through trial to replicate the ballistics of the blackpowder version, a copper-tubed lead bullet was also available, offering improved performance against dangerous game. See also Express cartridges List of rifle cartridges 13 mm caliber References Cartridgecollector, "20/577 Black Powder Express", cartridgecollector.net, retrieved 17 July 2018. Cartridgecollector, "20/577 Alexander Henry Nitro for Black Powder", cartridgecollector.net, retrieved 17 July 2018. Marrakai, "One of the harder ones: Alexander Henry's 20-bore/.577 Express", The big game express, No. 73, Eagle Park, Victoria: The Big Bore Rifle Club of Australia, July 2000. The Spanish Association of Cartridge Collectors, "20/577 Alexander Henry", municion.org, retrieved 17 July 2018. Czech Moravian Society of Collectors of Cartridges, "20/577 Alexander Henry", naboje.org, retrieved 17 July 2018. External links Royal Armouries, "Centrefire rifle proof cartridge - .577 in Henry by Eley (1900)", collections.royalarmouries.org, retrieved 17 July 2018. Category:Pistol and rifle cartridges Category:British firearm cartridges Category:Weapons and ammunition introduced in 1895