.338 Winchester Magnum

Rifle cartridge June 2026 .338 Winchester Magnum 375vs338.png 250px .375 H&H Magnum (Left) .338 Winchester Magnum (Right) US Quarter for scale United States Rifle Winchester Repeating Arms 1958 .375 H&H Magnum Belted, bottleneck .338 .369 .491 .513 .532 .050 2.500 3.340 86 grain 64,000 psi 1 in 10inch" Large rifle magnum 200 SP 2950 3866 225 SP 2800 3918 250 SP 2655 3914 275 SP 2489 3784 24 Accurate Powderhttp://www.accuratepowder.com/wp-content/uploads/2010/09/WesternLoadGuide1-2016_Web-1.pdf Western Powders Reloading and Load Guide Accurate Powder 6.0 59 2017-09-04 The .338 Winchester Magnum is a .338 in on caliber, belted, rimless, bottlenecked cartridge introduced in 1958 by Winchester Repeating Arms. It is based on the blown-out, shortened .375 H&H Magnum. http://www.gmdr.com/lever/338wmtext.htm 338 Winchester Magnum GMDR.com Mushial Gregory J 1998-11-09 2017-09-04 The .338 in on is the caliber at which medium-bore cartridges are considered to begin. The .338 Winchester Magnum is the first choice among professional brown bear (specifically grizzly bear) guides in Alaska to back up clients where a powerful stopping caliber is required on charging bears.http://www.chuckhawks.com/firearms_defense_bears.htm Firearms for Defense against Bears Hawks Chuck 2017-09-04 It is also the most popular medium-bore cartridge in North America338 Winchester Magnum http://www.norma.cc/content.asp?Typ=59&Lang=2&DocumentID=296&Submeny=4&Rubrik=Calibers&Title=338+Winchester Norma Precision AB 2 June 2011June 2026 InternetArchiveBot and has the most widely available choice in rifles among medium bore rifles. The action length is the same as a .30-06, and most major rifle manufacturers in the United States chamber rifles for the cartridge including the semi-automatic Browning BAR Mk II Safari, making it a very powerful combination against charging dangerous game.http://www.chuckhawks.com/338WinMag.htm Chuck Hawks 338 Win Mag 2014-03-25http://www.chuckhawks.com/rifles_dangerous_game.htm Rifles Dangerous Game 2014-03-25 The cartridge was intended for larger North American big-game species and has found use as for the hunting of thin-skinned African plains-game species. Cartridge history The .338 Winchester Magnum traces its heritage to the experiments conducted by Charles O'Neil, Elmer Keith and Don Hopkins with cartridges firing .333 in mm on bullets in the late 1940s. The use of .333 in mm on bullets may seem odd today but at the time this was the standard diameter of European .33 caliber bullets which were more common than the .338 in mm on diameter bullets used in cartridges such as the .33 Winchester. Furthermore, the .333 in mm on were available in heavier weights than the .338 in mm on bullets. O'Neil, Keith and Hopkins experiments led to the creation of the .333 OKH, which was based on the .30-06 Springfield case necked up to accept .33 caliber bullets and the .334 OKH which used a shortened .375 H&H Magnum necked down to accept the same bullets.Association National Rifle An Official Journal Of The NRA Behind the Bullet: .338 Winchester Magnum https://www.americanhunter.org/content/behind-the-bullet-338-winchester-magnum/ 2024-11-09 An Official Journal Of The NRA en The .338 Winchester Magnum was introduced in 1958 together with the .264 Winchester Magnum and the .458 Winchester Magnum, all of which used a common case design based on the .375 H&H Magnum case blown out and shortened to 2.500 in mm on, much like the .334 OKH. When the cartridge was introduced, Winchester offered a 200 gr g on at 3000 ft/s m/s on, a 250 gr g on at 2700 ft/s m/s on and a 300 gr g on at 2450 ft/s m/s on. Sometime later, Winchester introduced the Winchester Model 70 Alaskan chambered for the cartridge. This chambering left little doubt that the cartridge was intended for big heavy dangerous game.February 2022 Design and specifications The .338 Winchester Magnum follows the modern cartridge designs in that the cartridge case features a case with minimal taper so as to maximize case capacity yet providing reliable feeding and extraction.C. Bernes Frank Cartridges of the World Gun Digest Co 2022 978-1959265467 17th The .338 Winchester Magnum is based on the .375 H&H Magnum,Woodard W. Todd Cartridges of the World, 17th Edition: The Essential Guide to Cartridges for Shooters and Reloaders 2022 Gun Digest Media Frank C. Barnes 978-1-951115-59-3 17th Appleton which was shortened to 2.500 in mm on, blown out and necked down to hold a .338 in mm on bullet.SAAMI Centerfire Rifle Standards – Z299.4 https://saami.org/wp-content/uploads/2019/02/ANSI-SAAMI-Z299.4-CFR-Approved-2015-12-14-Revised-2019-02-06.pdf Sporting Arms and Ammunition Manufacturers' Institute 2025-12-30 104 The case has a capacity of 86.0 grain of H2O (5.58cm3). The cartridge follows the design of the standard length Weatherby Magnum cartridges such as the .257 Weatherby Magnum, .270 Weatherby Magnum and the 7 mm Weatherby Magnum for which Winchester had supplied basic brass until 1948.C. Bernes Frank Cartridges of the World Both the Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives(CIP) and the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) govern and regulate the specifications regarding the .338 Winchester Magnum. 500px|alt=338 Winchester Magnum Cartridge Schematic|.338 Winchester Magnum SAAMI cartridge dimensions - all dimensions in inches (mm) SAAMI and the CIP recommend a 6-groove barrel with a twist rate of one revolution in 10 in mm on of barrel length with a bore Ø of .330 in mm on and a groove diameter of Ø of .338 in mm on, with each groove having a width of .110 in mm on. The SAAMI-recommended average pressure for the cartridge is 64000 psi bar on. The CIP enforces a 4300 bar psi on pressure limit for the cartridge.C.I.P. TDCC Sheet: .338 Win. Mag. https://bobp.cip-bobp.org/uploads/tdcc/tab-iii/tabiiical-en-page22.pdf Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives 2025-12-30 Performance This cartridge is able to push a 225 gr g on bullet to velocities of 2800 ft/s on, generating 3918 ftlbf J on, http://winchester.com/Products/rifle-ammunition/Advanced/expedition-big-game/Pages/S338CT.aspx 338 Winchester Mag. 225 gr. Expedition Big Game Winchester Ammunition 2017-09-04 providing energy values at 200 yards that are roughly equivalent to the .30-06 Springfield's energy values http://winchester.com/Products/rifle-ammunition/Advanced/expedition-big-game/Pages/S3006CT.aspx 30-06 Springfield 180 gr. Expedition Big Game Winchester Ammunition 2017-09-04 at muzzle. Bullets are available in a very wide range of designs and weights ranging from 150http://www.brownells.com/ammunition/rifle-ammo/winchester-ballistic-silvertip-ammo-338-win-mag-150gr-sku105202635-43227-96373.aspx WINCHESTER BALLISTIC SILVERTIP RIFLE AMMUNITION 2013-02-17 to 300 grains. SAAMI pressure level is 64,000 psi. The .338 Winchester Magnum is capable of launching heavier bullets than the .30 caliber (7.62mm) cartridges. The most common bullets loaded for the .338 Winchester range from 200 gr g on to 250 gr g on. Typical bullet weights for factory ammunition are 200 gr g on, 210 gr g on, 225 gr g on and the 250 gr g on. Typical velocities for these bullet weights range from 2960 ft/s m/s on for the 200 gr g on to about 2660 ft/s m/s on for the 250 gr g on bullet each generating approximately 3900 ftlbf J on of energy. This is approximately 25% more energy generated than the 30-06 Springfield. Winchester's 200 gr g on Ballistic Silvertip ammunition (SBST338) retains over 1600 ftlbf J on at 625 yd m on and has 1000 ftlbf J on energy at 800 yd m on.Super X ® - High Brass Winchester Ammunition https://winchester.com/en/Products/Ammunition/Rifle/Super-X 2025-12-30 winchester.com enTrevelyan Laura http://www.bloomsburycollections.com/book/the-winchester-legend-of-the-west The Winchester: Legend of the West 2016 I.B. Tauris 978-0-85772-839-5 The Damn Yankee Rifle 10.5040/9781350989382.ch-001 Winchester's Combined Technologies Accubond ammunition (S338CT) extend the range for these energy levels even further to 675 yd m on and 850 yd m on respectively. Hornady's 200 gr g on SST Superformance load has muzzle energy of 4076 ftlbf J on @ 3030fps. It maintains 1899 ftlbf J on @ 2068fps @ 500 meters. Hornady's 225 gr g on SST Superformance load has muzzle energy of 4029 ftlbf J on @ 2840fps. It maintains 2025 ftlbf J on @ 2014fps @ 500 meters. This is from a 24" test barrel as compared to 27.5" test barrel for a 338 Lapua. Figures would be higher if shot from a 27.5" test barrel but still over 150fps slower than a 338 Lapua if tested with the same length barrel.338 Win Mag 200 gr SST® Superformance® - Hornady Manufacturing, Inc https://www.hornady.com/ammunition/rifle/338-win-mag-200-gr-sst-superformance https://web.archive.org/web/20221127151211/https://www.hornady.com/ammunition/rifle/338-win-mag-200-gr-sst-superformance 2022-11-27 2025-12-30 Hornady Manufacturing, Inc en live The recoil of this caliber is quite heavy, with about 31 ftlbf J on of recoil energy in a 9 lb on rifle.Rifle Recoil Table https://www.chuckhawks.com/recoil_table.htm 2025-12-30 www.chuckhawks.com This is about twice as much as the recoil from an average .308 Winchester. Strong recoil like this can be mitigated with the use of properly designed stocks and recoil pads. By comparison, this cartridge has less recoil than other more powerful .338-caliber rifles such as the .338 RUM, .340 Weatherby and .338 Lapua. Sporting usage When the .338 Winchester was introduced there was a general preference for heavier bullet weights between 250 - 300 gr g on. However, since that time preferred bullet weights have decreased to weights between 200 - 225 gr g on. This is due in part to the bullet technology available today. Lighter bullets made today are able to hold together and penetrate deeper than heavier bullets of the past.Bodinson Holt November 2000 The 338 Winchester Magnum: King Of The Elk Cartridges Guns Magazine Publishers Development Corporation https://www.thefreelibrary.com/THE+338+WINCHESTER+MAGNUM%3a+KING+OF+THE+ELK+CARTRIDGES.-a065574867 2017-09-04 In North America, the .338 Winchester Magnum is most commonly used for the hunting of larger deer species such as elk and moose. It is quite popular with elk hunters, with bullets ranging between 200 - 225 gr g on generally preferred for large class 3 game such as elk or moose. Apart from the larger deer species, the .338 Winchester Magnum is often used for the hunting of and defense against dangerous class 3 game, particularly the great bears including grizzly, polar and brown bears. It is often carried by fishermen, hunters and guides in Alaska and Canada for protection as encounters with these larger bear species can be common.https://static1.squarespace.com/static/59efb1fea9db093bfb03f697/t/5e12dc8985478a3528596880/1578294425839/whitepaper_firearms_200106+FINAL.pdf ADVANCED DRAFT Whitepaper: Dangerous animal defence Greenfields Exploration Ltd January 2020 2026-05-17https://chuckhawks.com/grizzly_cartridges.htm Grizzly, Brown and Polar Bear Cartridges chuckhawks.com 2026-05-17 The .338 Winchester Magnum can be considered a good all-round plains game hunting rifle in Africa. It has also been found to be effective against the big cats where hunting allows for the use of the cartridge.February 2022 Some .338 Magnum cartridges (circle size proportional to recoil). 220 170 center File:Game Class vs 6 inch Maximum Point Blank Range comparing various 338 Winchester cartridges.png Game Class vs 6 inch Maximum Point Blank Range. File:Sectional Density vs Ballistic Coefficient comparing various 338 Winchester cartridges.png Sectional Density vs Ballistic Coefficient. Rifles and ammunition Due to the cartridge's popularity most North American rifle manufacturers offer rifles chambered in the .338 Winchester Magnum.Jones Allan 2019-02-20 The .338 Winchester Magnum https://www.shootingtimes.com/editorial/the-338-winchester-magnum/357438 2025-12-30 Shooting Times en Ruger, Browning, Kimber, Remington, Savage, Weatherby, Mossberg, Howa and Winchester chamber the cartridge in several product lines. Almost all custom rifle makers in the United States and Canada produce .338 Winchester rifles. In European rifle makers Blaser, Mauser, Sako and Tikka also manufacture rifles for this cartridge. The large number of rifle choices available in the .338 Winchester Magnum offers the rifleman a greater choice in available rifles.February 2022 All North American ammunition makers offer several loadings of the .338 Winchester Magnum to the public for sale. At this point in time Federal has six in their Vital-Shok and Fusion ammunition lines, Hornady has five, including four in their Superformance ammunition which is putting an end to the light magnum and heavy magnum line of ammo but adds up to 200 ft/s m/s on more without added recoil or muzzle blast. The 185 gr. GMX (gilding metal expanding) round has the following performance: 3080 ft/s m/s on at the muzzle, 2850 ft/s m/s on at 100 yards, 3896 ftlbf J on of kinetic energy at the muzzle and 3337 ftlbf J on at 100 yards. 200 gr. Remington and Winchester offer four loadings each for the cartridge. Several smaller ammunition including Cor-Bon and Double Tap also manufacture loaded ammunition.February 2022 See also 8 mm caliber List of rifle cartridges Sectional density Table of handgun and rifle cartridges References External links Category:Pistol and rifle cartridges Category:Winchester Magnum rifle cartridges