.450 Bushmaster

Rifle cartridge .450 Bushmaster 450 BM + 223.jpg 200px .450 Bushmaster (left), .223 Remington (right) United States Rifle LeMAG Firearms LLC 2007http://www.bushmaster.com/ Bushmaster - Welcome to Bushmaster Firearms International 28 November 2007 https://web.archive.org/web/20071128083606/http://www.bushmaster.com/ 12 November 2021 2007-11-28 2009–presentOctober 30, 2021 Bushmaster firearms reintroduces the 450 bushmaster Rifle GUNSweek.com May 5, 2023 https://www.gunsweek.com/en/rifles/news/bushmaster-firearms-reintroduces-450-bushmaster-rifle BushmasterHornady .284 Winchester Rebated, straight .4520 .4420 .4800 https://saami.org/wp-content/uploads/2018/01/Z299-4_ANSI-SAAMI_CFR.pdf CARTRIDGE and CHAMBER DRAWING - 450 BUSHMASTER 147 2018-08-22 https://web.archive.org/web/20180822175305/https://saami.org/wp-content/uploads/2018/01/Z299-4_ANSI-SAAMI_CFR.pdf SAAMI 2018-08-22 .5000 .4730 .0540 1.700 2.260 59.5 38500 SAAMI no 250 SST 675 3694 260 AccuTip 665 3727 250 FTX Hornady BLACK 671 3648 20 in (508 mm) Lynx Defense 450 Bushmaster Ballistic Chart LynxDefense.com thumb|The .450 Bushmaster was developed for big game hunting with modern rifles. The .450 Bushmaster (11.48x43mmRB) is a rifle cartridge developed by Tim LeGendre of LeMag Firearms, and licensed to Bushmaster Firearms International. The .450 Bushmaster is designed to be used in standard M16, M4, and AR-15 rifle lower receivers, using modified magazines and upper receiver assemblies.Massaro Philip Behind the Bullet: .450 Bushmaster https://www.americanhunter.org/content/behind-the-bullet-450-bushmaster/ 2 August 2025 American Hunter Guns, Gear & Ammo Review National Rifle Association of America 16 November 2022 History The .450 Bushmaster is descended from the Thumper concept popularized by gun writer Jeff Cooper. Cooper was dissatisfied with the small-diameter bullet 5.56×45mm NATO (.223 Remington) of the AR-15, and envisioned a need for a large bore (.44 cal or greater) cartridge in a semi-automatic rifle to provide one-shot kills on big-game animals at 250 yards. Inspired by this, LeGendre developed his .45 Professional cartridge in the early 2000's and built and delivered an AR-10 in .45 Professional to Cooper.Barnes Frank C. Cartridges of the World: A Complete Illustrated Reference for More Than 1,500 Cartridges 2012 Gun Digest Books 9781440230592 97 13th https://www.abebooks.com/Cartridges-World-Complete-Illustrated-Reference-500/31931894382/bd 2 August 2025Bauserman Mace 450 Bushmaster: A Semi-Auto Hunting Powerhouse https://freerangeamerican.us/450-bushmaster/ 2 August 2025 Free Range American © 2025 Free Range American 2 May 2023 After being sold the .45 Professional concept in 2007, Bushmaster requested the ammunition manufacturer Hornady to produce the .45 Professional cartridge for this project, but Hornady wanted to shorten the cartridge case and overall length to accommodate their 0.452 in. 250-grain pointed SST flex-tip bullet; plus .452 is a very common bullet size, being used by the .45 Colt, .45 ACP, .454 Casull, & .460 S&W Magnum, and the 250-grain SST was already a popular bullet for the .454 & .460. Bushmaster and LeGendre approved the change from a 1.772 in. (45 mm) case and 2.362 in. (60 mm) overall length (OAL) to the now standard 1.700 in. (43.18 mm) case and 2.260 in. (57.40 mm) OAL. This permitted operation in the more abundant and popular AR-15 platform, versus the larger less common AR-10 platform. Also, a name change to ".450 Bushmaster" was approved.Towsley Bryce M. Big-Bore AR Cartridges https://www.americanrifleman.org/content/big-bore-ar-cartridges/ 2 August 2025 American Rifleman Rifle Ammo National Rifle Association of America 26 June 2016 In 2006 the rights to the .450 Bushmaster were sold to Cerberus Capital Management, which eventually became part of Freedom Group, a company that also owned Remington Arms, Marlin Firearms, Advanced Armament Corporation (AAC) and others.50 Years Of Bushmaster Firearms https://www.americanrifleman.org/content/50-years-of-bushmaster-firearms/ 2 August 2025 American Rifleman National Rifle Association of America 3 August 2023 Following Remington's bankruptcy in 2020 due to multiple lawsuits,Brickley Peg Bankrupt Gun Maker Remington Outdoor to Be Broken Up and Sold https://www.wsj.com/articles/bankrupt-gun-maker-remington-outdoor-to-be-broken-up-and-sold-11601246175 2 August 2025 The Wall Street Journal © Dow Jones & Company, Inc. 27 September 2020 the company's assets were sold off, with the .450 Bushmaster and its parent company being purchased by Nevada based Franklin Armory in 2021, best known for making the Binary Fire Control System.Eger Chris Bushmaster Announces a Comeback https://www.guns.com/news/2021/02/15/bushmaster-announces-a-comeback 2 August 2025 Guns.com © Guns.com 15 February 2021 Loadings and ballistics thumb|.450 Bushmaster single-stacks in magazines, unlike .223, which sits in two staggered columns thumb|right|.450 Bushmaster cartridges and components The .450 Bushmaster makes use of .452 in. bullets because the lower impact velocities and energies would not adequately expand the heavier jacketed .458 in. bullets.http://www.hornady.com/store/45-Cal-.452-250-gr-FTX-for-450-Bushmaster/ 45 Cal .452 250 gr FTX (450 Bushmaster) Hornady 2016-08-13 https://web.archive.org/web/20170710114652/http://www.hornady.com/store/45-Cal-.452-250-gr-FTX-for-450-Bushmaster 2017-07-10 The cartridge is chambered in bolt-action rifles by Ruger, Savage, Mossberg, and Remington. Ruger also chambers their Ruger No. 1 single shot rifle, and their AR-556 MPR rifle in .450,Ruger AR-556 MPR .450 Bushmaster https://ruger.com/products/ar556MPR/specSheets/8522.html Ruger © Sturm, Ruger & Co. 2 August 2025 and Franklin Armory's XO-26 BFS-III equipped AR-15 pistol is chambered in .450.Pridgen D.K. FRANKLIN ARMORY XO-26 .450 BUSHMASTER http://www.tactical-life.com/combat-handguns/franklin-armory-xo-26-450-bushmaster/ Tactical-Life Magazine 26 Feb 2014BFSIII® EQUIPPED XO®-26 R4 https://franklinarmory.com/shop/firearms/bfsiii-equipped-xo-26-r4/ Franklin Armory © 2025 Franklin Armory® 2 August 2025 As of 2022, Bushmaster Firearms is once again manufacturing rifles chambered in the .450 BushmasterBRAVO ZULU™ 16" https://www.bushmaster.com/shop/firearms/bushmaster-bravo-zulu-16-450bm/ Bushmaster © 2025 Bushmaster® Firearms 2 August 2025 The cartridge fits single-stacked in a standard AR-15 magazine with a single-stack follower. A 10-round AR-15 magazine body yields a four-round Lancer Magazine – 4 Round Tromix Lead Delivery Systems https://tromix.com/product/lancer-magazine-4-round/ Tromix.com 27 June 2018 8 December 2019 17 October 2021 https://web.archive.org/web/20211017024527/https://tromix.com/product/lancer-magazine-4-round/ magazine, a 20-round AR-15 magazine body yields a five- to seven-round Duramag SS .450 Bushmaster (Stainless Steel) Duramag https://dura-mag.com/product/duramag-ss-450-bushmaster-stainless-steel/ 2019-12-08 2019-12-08 https://web.archive.org/web/20191208204607/https://dura-mag.com/product/duramag-ss-450-bushmaster-stainless-steel/ magazine, and a 30-round body yields a nine-round AR-STONER Mag AR-15 450 Bushmaster 9-Round SS Black Midwayusa.com https://www.midwayusa.com/product/1006265648 magazine. As of 2025 Ammo Inc., Federal, Hornady, Remington, and Winchester manufacture ammunition for the rifle,Rifle Ammo - .450 Bushmaster https://palmettostatearmory.com/ammo/rifle-ammo.html?caliber_multi_v2=.450+Bushmaster PSA © Palmetto State Armory 2 August 2025 and Starline manufactures empty brass for handloading..450 Bushmaster Brass https://www.starlinebrass.com/450-bushmaster Starline © Starline Brass 2 August 2025 See also List of AR platform cartridges List of rebated rim cartridges List of rifle cartridges Table of handgun and rifle cartridges 11 mm caliber .350 Legend .360 Buckhammer .400 Legend .444 Marlin .45-70 .458 SOCOM .45 Raptor .460 S&W Magnum .50 Beowulf 12.7×55mm STs-130 References External links Hornady Manufacturing - 450 Bushmaster (Archived 2009-08-05) Bushmaster .450 Rifle & Carbine - Bushmaster Firearms (Archived 2009-08-05) Hornady Manufacturing Company :: Ammunition :: Rifle :: Choose by Caliber :: 450 Bushmaster :: 450 Bushmaster 250 gr FTX LEVERevolution Category:Rebated rim cartridges Category:Pistol and rifle cartridges Category:Bushmaster firearms