The .240 Magnum Rimless Holland & Holland (also known as the .240 Apex and the .240 Super Express) is a centrefire sporting rifle cartridge developed in English gunmakers Holland & Holland no later than 1919,[3] primarily for use in hunting deer and plains game.[1]
As it was common for rimless hunting cartridges, a rimmed (beltless) variant, at the time called just "Holland's 240 Super Express"[4] and now sometimes named .240 Flanged Magnum or .240 H&H Flanged, was developed simultaneously for break-barrel rifles and combination guns.[5][2]
Overviewedit
The ballistic performance of the .240 H&H in factory loads is very similar to that of the .243 Winchester, with a 100-grain (6.5 g) bullet with a diameter of .245 inches (contrary to the .240 name) giving a muzzle velocity of approximately 2,900 feet per second (880 m/s). When it is loaded at the same pressure as the .243 WSSM using modern powders, the .240 H&H has the potential for slightly better performance.
Most bolt-action rifles made for the .240 H&H will be amply strong enough to handle hand-loaded cartridges at high pressure.
apex, topic, this, article, meet, wikipedia, notability, guidelines, products, services, please, help, demonstrate, notability, topic, citing, reliable, secondary, sources, that, independent, topic, provide, significant, coverage, beyond, mere, trivial, mentio. The topic of this article may not meet Wikipedia s notability guidelines for products and services Please help to demonstrate the notability of the topic by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond a mere trivial mention If notability cannot be shown the article is likely to be merged redirected or deleted Find sources 240 Apex news newspapers books scholar JSTOR February 2022 Learn how and when to remove this template message The 240 Magnum Rimless Holland amp Holland also known as the 240 Apex and the 240 Super Express is a centrefire sporting rifle cartridge developed in English gunmakers Holland amp Holland no later than 1919 3 primarily for use in hunting deer and plains game 1 240 Magnum RimlessTypeRiflePlace of originEnglandProduction historyDesignerHolland amp HollandDesigned1919ManufacturerHolland amp HollandSpecificationsCase typeBelted bottleneckBullet diameter 245 in 6 2 mm Neck diameter 274 in 7 0 mm Shoulder diameter 403 in 10 2 mm Base diameter 450 in 11 4 mm Rim diameter 467 in 11 9 mm Rim thickness 035 in 0 89 mm Case length2 49 in 63 mm Overall length3 21 in 82 mm Primer typeKynoch 81Ballistic performanceBullet mass type Velocity Energy100 gr 6 g SP 2 900 ft s 880 m s 1 865 ft lbf 2 529 J Source s Cartridges of the World 1 240 Magnum FlangedSpecificationsCase typeRimmed bottleneckBullet diameter 245 in 6 2 mm Neck diameter 274 in 7 0 mm Shoulder diameter 402 in 10 2 mm Base diameter 448 in 11 4 mm Rim diameter 513 in 13 0 mm Rim thicknessUNKCase length2 5 in 64 mm Overall length3 25 in 83 mm Primer typeKynoch 81Ballistic performanceBullet mass type Velocity Energy100 gr 6 g SN 2 775 ft s 846 m s 1 711 ft lbf 2 320 J Test barrel length 28Source s Kynoch 2 As it was common for rimless hunting cartridges a rimmed beltless variant at the time called just Holland s 240 Super Express 4 and now sometimes named 240 Flanged Magnum or 240 H amp H Flanged was developed simultaneously for break barrel rifles and combination guns 5 2 Overview editThe ballistic performance of the 240 H amp H in factory loads is very similar to that of the 243 Winchester with a 100 grain 6 5 g bullet with a diameter of 245 inches contrary to the 240 name giving a muzzle velocity of approximately 2 900 feet per second 880 m s When it is loaded at the same pressure as the 243 WSSM using modern powders the 240 H amp H has the potential for slightly better performance Most bolt action rifles made for the 240 H amp H will be amply strong enough to handle hand loaded cartridges at high pressure 240 H amp H Performance Comparison Cartridge Bullet weight Muzzle velocity Muzzle energy 240 H amp H Magnum 100 gr 6 5 g 2 900 ft s 880 m s 1 865 ft lbf 2 529 J 240 Weatherby Magnum 100 gr 6 5 g 3 406 ft s 1 038 m s 2 576 ft lbf 3 493 J 242 Rimless Nitro Express 100 gr 6 5 g 2 800 ft s 850 m s 1 740 ft lbf 2 360 J 243 Winchester 100 gr 6 5 g 2 960 ft s 900 m s 1 945 ft lbf 2 637 J 243 Winchester Super Short Magnum 100 gr 6 5 g 3 110 ft s 950 m s 2 147 ft lbf 2 911 J 244 H amp H Magnum 100 gr 6 5 g 3 500 ft s 1 100 m s 2 720 ft lbf 3 690 J 246 Purdey 100 gr 6 5 g 2 950 ft s 900 m s 1 930 ft lbf 2 620 J 6 mm Lee Navy 100 gr 6 5 g 2 680 ft s 820 m s 1 595 ft lbf 2 163 J 6 mm Remington 100 gr 6 5 g 3 100 ft s 940 m s 2 133 ft lbf 2 892 J See also editList of rifle cartridges 6 mm caliberReferences edit a b Barnes Frank C Cartridges of the World 15th ed Gun Digest Books Iola 2016 ISBN 978 1 4402 4642 5 a b Kynoch Ammunition Big Game Cartridges www kynochammunition co uk archived 15 August 2016 Holland amp Hollands Apex 240 super express rifle H amp H 1933 catalog 240 FLANGED MAGNUM Cartridgecollector net Retrieved from https en wikipedia org w index php title 240 Apex amp oldid 1160174863, wikipedia, wiki, book, books, library,
