.465 H&H Magnum

Firearms cartridge introduced in 2003 September 2014 .465 Holland & Holland Magnum United Kingdom Rifle Holland & Holland 2003 2003–present .378 Weatherby Magnum Belted, bottleneck .468 .459 .494 .531 .582 .579 .063 2.894 3.550 134 Large rifle, magnum 62366 480 SP/Solid 2375 6012 The .465 H&H Magnum also known as .465 Holland & Holland Magnum, is a modern big bore firearms cartridge. It was introduced by Holland & Holland in 2003 together with the .400 H&H Magnum. The .465 H&H Magnum is a .468 caliber, belted, bottleneck cartridge. The cartridge is a necked-up, shoulder-lowered tapered cartridge based on the .378 Weatherby Magnum case. General information Holland & Holland began receiving requests from potential customers for a cartridge that would provide more power than the .375 H&H Magnum. Holland & Holland director Russell Wilkins undertook the project which culminated in the .400 H&H Magnum and the .465 H&H Magnum cartridge designs. The original design requirements called for a muzzle energy of over 6000 ftlbf J on. To meet this requirement Holland & Holland chose the .460 Weatherby Magnum case as a starting point in their design. Barnes Frank C. Skinner, Stan Cartridges of the World 11th 1965 2006 Gun Digest Books 400 0-89689-297-2 This .465 H&H Magnum cartridge is not the same as the famous .500/465 Nitro Express also designed by Holland & Holland for "India" double rifles. The .500/465 Nitro Express is the only other cartridge with the same bullet diameter as the .465 H&H Magnum. Both cartridges are designed to fire a 480 gr on .468 caliber (11.89 mm) bullet. Although the cartridge is capable of operating at rather high pressures, Holland & Holland chose to load the cartridge to a moderate pressure of around 47000 psi bar on. Furthermore, the taper and shallow shoulder of the cartridge aids in the smooth, reliable feeding and extraction.Hawks Chuck First Look: The .465 H&H Magnum Belted Rimless http://www.chuckhawks.com/465_HHMag.htm Chuck Hawks 25 August 2010 The .465 H&H Magnum is an excellent cartridge for all-around game and African dangerous game including the Big 5. It has a similar trajectory to that of the .375 H&H Magnum. Ammunition for the .465 H&H Magnum is being manufactured by Wolfgang Romey for Holland & Holland. Specifications Both .465 H&H Belted Magnum cartridge and chamber specifications were standardized by CIP on 2006-09-19.http://www.cip-bobp.org/homologation/en/tdcc_public?page=2&cartridge_type_id=3 CIP - Homologation www.cip-bobp.org 2016-10-16 https://web.archive.org/web/20161019041630/http://www.cip-bobp.org/homologation/en/tdcc_public?page=2&cartridge_type_id=3 2016-10-19 deadhttp://www.cip-bobp.org/homologation/uploads/tdcc/tab-iii/tabiiical-en-page38.pdf C.I.P. drawing for 465 H&H Belt. Mag. The .465 H&H Magnum is based on the .460 Weatherby Magnum case, itself based on the .378 Weatherby Magnum. The .378 Wea. Mag. was itself based on adding a belt to the .416 Rigby case & giving it a Weatherby double radius shoulder. Holland & Holland took the .460 Weatherby case and moved the shoulder back, creating a longer neck for the cartridge, and increased the body taper of the cartridge. The case is also necked up to accept a .465 caliber (11.65 mm) bullet. 650px|alt=.465 Holland & Holland Magnum Cartridge Schematic|.465 Holland & Holland Magnum cartridge dimensions – all dimensions in mm (in) .465 Holland & Holland Magnum cartridge schematic: All dimensions in millimeters [inches]. Rifles chambered for the .465 H&H Magnum have a bore ∅ of 11.65 mm in on and a groove ∅ of 11.87 mm in on. Twist rate for rifles can range from one revolution in 406 mm in on to 711 mm in on. The maximum average pressure suggested for the cartridge is 4300 bar psi on. See also Table of handgun and rifle cartridges References Category:Pistol and rifle cartridges Category:Holland & Holland cartridges Category:British firearm cartridges