| 词条 | .50 Beowulf |
| 释义 |
| name = .50 Beowulf | image = Beowulf Cartridges.JPG | image_size = 320px | caption = 5.56 mm compared to .50 Beowulf cartridges. | origin = United States | type = Rifle | service = | used_by = | wars = | designer = | design_date = 2001 | manufacturer = | production_date = 2001 | number = | variants = | is_SI_specs = | parent = .50 Action Express | case_type = Rebated rim, straight | bullet = .500 | neck = .525 | shoulder = | base = .535 | rim_dia = .445 | rim_thick = | case_length = 1.65 | length = 2.125 | pressure = 33,000 psi | primer = Large pistol magnum | is_SI_ballistics = | bw1 = 300 | btype1 = Speer Gold Dot JHP Alexander Arms | vel1 = 1870 | en1 = 2330 | bw2 = 325 | btype2 = Speer JHP Alexander Arms | vel2 = 1800 | en2 = 2338 | bw3 = 335 | btype3 = Rainer Plated FP Alexander Arms | vel3 = 1771 | en3 = 2333 | bw4 = 335 | btype4 = Rainier Plated HP Alexander Arms | vel4 = 1900 | en4 = 2678 | bw5 = 400 | btype5 = Hawk JFP Alexander Arms | vel5 = 1800 | en5 = 2878 | test_barrel_length = 16 | balsrc = }} The .50 Beowulf is a rifle cartridge developed by Jeffrey Ulatan [1] of Alexander Arms for use in a modified AR-15 rifle. Design and specificationsThe cartridge utilizes a rebated rim, sized to match the rim of the 7.62×39mm and 6.5mm Grendel rounds. The case body is very similar in dimensions to the .500 S&W Magnum revolver cartridge, being slightly longer and fully tapered for automatic feeding in the weapon. The round is intended to improve stopping power greatly at short- to medium-range as compared to the standard 5.56×45mm NATO round. One of its advertised uses is at vehicle checkpoints, since the heavy bullet's flight path is not easily deflected by auto glass or standard vehicle body panels. Design limitationsWith normal bullet weights between {{convert|300|and|400|gr|g|lk=on}}, overall cartridge length shorter than that of an AR-15 magazine well, and holding to pressures of 33,000 psi limited by the AR bolt strength system,[2] the .50 Beowulf is best described as a low-velocity, heavy caliber, making its ballistics roughly equivalent to those of early .45-70 Government rounds rather than the higher pressure rounds tolerated by lever-action rifles such as the Marlin Model 1895.[3] Adaptability is limited due to its use of the 7.62×39mm bolt face.[4] Proprietary statusThe .50 Beowulf is a proprietary caliber developed as a specialized cartridge. Alexander Arms and Delta Firearms oversees all aspects of the production of the system and related accessories. Their reluctance to divulge information has been a source of irritation to some writers.[3] Because Alexander Arms holds a trademark on the name .50 Beowulf, a number of other companies produce weapons and ammunition reverse engineered to the same dimensions under the generic name 12.7x42mm. Sporting usesAlthough much has been written about its tactical uses, the .50 Beowulf is gaining recognition as a sporting cartridge. It is becoming more widely recognized as being usable for a wide variety of North American game,[5] including deer, moose, and black bear.[3] Similar cartridgesThe cartridge has its lineage in the .50 Action Express, starting with the L.A.R. Grizzly and in modern times, the Magnum Research Desert Eagle pistol, with significant modification to improve functionality and safety in the AR-15 rifle.[6] See also
Notes1. ^{{cite web| last = Berger| first = Matt|authorlink =| coauthors =| title = ALEXANDER ARMS .50 BEOWULF| work = Special weapons for military & police| publisher = Tactical-life.com| date = December 2011| url = http://www.tactical-life.com/online/special-weapons/alexander-arms-50-beowulf/| doi =| accessdate = March 26, 2019}} 2. ^{{cite web| last = Cutshaw| first = Charlie | title = .50 caliber Beowulf| work =Tactical Response | date = Jul–Aug 2006| url = http://www.hendonpub.com/resources/article_archive/results/details?id=3631| accessdate = January 28, 2013}} 3. ^1 2 {{Cite web| last = D'Alessandro| first = Joseph| title = The 50 Beowulf: A Reluctant Retrospective| url = http://www.realguns.com/Commentary/comar137.htm| accessdate = 2009-06-22| archive-url = https://web.archive.org/web/20070816234806/http://www.realguns.com/Commentary/comar137.htm| archive-date = 2007-08-16| dead-url = yes| df = }} 4. ^{{Cite web |url=http://www.firearmssite.com/50_beowulf.htm |title=the .50 Beowulf |access-date=2013-01-29 |archive-url=https://web.archive.org/web/20151107105509/http://www.firearmssite.com/50_beowulf.htm |archive-date=2015-11-07 |dead-url=yes |df= }} 5. ^{{cite web| last = Youngblood| first = Paul| authorlink = | coauthors = | title = What's the .50 Beowulf good for?| work = Guns & Ammo| date = July 14, 2011| url = http://www.gunsandammo.com/2011/07/14/whats-the-50-beowulf-good-for/| accessdate = January 28, 2013| archive-url = https://web.archive.org/web/20130206170101/http://www.gunsandammo.com/2011/07/14/whats-the-50-beowulf-good-for/| archive-date = 2013-02-06| dead-url = yes| df = }} 6. ^{{Cite web |title=Alexander Arms - Frequently Asked Questions |url=http://www.alexanderarms.com/index.php/faqs.html |accessdate=2012-01-11 |archive-url=https://web.archive.org/web/20120104113858/http://www.alexanderarms.com/index.php/faqs.html |archive-date=2012-01-04 |dead-url=yes |df= }} External links
2 : 12.7 mm firearms|Pistol and rifle cartridges |
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