|This article needs additional citations for verification. (January 2013)|
5.56 mm compared to .50 Beowulf cartridges.
|Place of origin||United States|
|Parent case||.50 Action Express|
|Case type||Rebated rim, straight|
|Bullet diameter||.500 in (12.7 mm)|
|Neck diameter||.525 in (13.3 mm)|
|Base diameter||.535 in (13.6 mm)|
|Rim diameter||.445 in (11.3 mm)|
|Case length||1.65 in (42 mm)|
|Overall length||2.125 in (54.0 mm)|
|Primer type||Large pistol magnum|
|Test barrel length: 24 (discontinued)
Source(s): Alexander Arms
Design and specifications
The cartridge utilizes a rebated rim, sized to match the rim of the 7.62×39mm and 6.5 mm 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.
With normal bullet weights between 300 and 400 grains (19 and 26 g), 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, 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 modern lever action rifles such as the Marlin Model 1895. Adaptability is limited due to its use of the 7.62×39mm bolt face.
The .50 Beowulf is a proprietary caliber developed as a specialized cartridge and weapon. Alexander Arms 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.
Although much has been written about its tactical uses, the .50 Beowulf is gaining recognition as a sporting cartridge. By virtue of its ballistics which are similar or superior to those of the venerable .45-70 Government cartridge it is becoming more widely recognized as being usable for a wide variety of North American game, including deer, moose, and black bear.
The cartridge has its lineage in the .50 Action Express, a cartridge originally developed for the Magnum Research Desert Eagle pistol, with significant modification to improve functionality and safety in the AR-15 platform.
- Berger, Matt (December 2011). "ALEXANDER ARMS .50 BEOWULF". Special weapons for military & police. Tactical-life.com. Retrieved January 28, 2013.
- Cutshaw, Charlie (Jul/Aug 2006). ".50 caliber Beowulf". Tactical Response. Retrieved January 28, 2013.
- D'Alessandro, Joseph. "The 50 Beowulf: A Reluctant Retrospective". Retrieved 2009-06-22.
- the .50 Beowulf
- http://archives.gunsandammo.com/content/ammunition-ballistics-50-beowulf 50 Beowulf ballistics table
- http://archives.gunsandammo.com/content/ammunition-ballistics-4570-cowboy .45-70 cowboy load ballistics
- Youngblood, Paul (July 14, 2011). "What's the .50 Beowulf good for?". Guns & Ammo. Retrieved January 28, 2013.
- "Alexander Arms - Frequently Asked Questions". Retrieved 2012-01-11.
- Alexander Arms website
- "Alexander Arms .50 Beowulf", Jeff Quinn, Gunblast.com (online magazine), July 8, 2002
- "Alexander Arms' New 'Overwatch' .50 Beowulf", Jeff Quinn, Gunblast.com (online magazine), June 15, 2003
- "More Punch for the AR-15", Anthony G. Williams, The Cartridge Researcher, the bulletin of the European Cartridge Research Association, May 2005
- "BFR .50 Beowulf Revolver", Jeff Quinn, Gunblast.com (online magazine), March 12, 2004