50 Beowulf is a proprietary cartridge of Alexander Arms, introduced in 2001 to bring big-bore performance to the AR platform. The 1.65-inch case is similar to the 500 S&W, except the rim is sharply rebated to the same diameter as the 7.62X39mm cartridge. Bullet diameter is .500-inch, same as the 50 AE. Bullet weights range from 300 to 400 grains; a 400-grain bullet at 1800 fps yields over 2800 ft-lbs of energy, a very powerful cartridge in an AR15 frame. The 50 Beowulf offers a sound option for hunting larger game with an AR, and at moderate ranges is extremely effective on moose and bears.
