12.7x42mm (AKA 50 BEOWULF) 500gr XTP-20 ROUNDS

by Detroit Ammunition Company|Item # GLA1274250020


Out of stock


12.7x42mm (AKA 50 BEOWULF) 500gr XTP-20 ROUNDS

This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases

Condition: New
Bullet Weight: 500 Grain
Bullet Type: Hornady XTP
Ammo Casing: Brass
Quantity: 20 ROUNDS
Ammo Caliber: .50  Beowulf (12.7x42mm)
Primer Type: Boxer
Velocity: 1300 fps


Bill Alexander, of Alexander Arms, was one of the pioneers of big-game hunting cartridges in the AR-15-style rifles. He developed this cartridge and named it after Beowulf, a legendary literary warrior who slayed the invincible Grendel by ripping his arm off. The day after that battle, Beowulf fought the monster that was Grendel’s mother and killed her by cutting off her head with a mighty sword from her own armory; a sword of which it was said, “no other man could have hefted in battle.” Years later, when he was an old man on the decline and but a shell of his former self, Beowulf fought and killed a dragon.

The .50 Beowulf was introduced in 2001 and was the first of the big-bore cartridges designed for the AR-15. The cartridge is based on a lengthened .50 AE case with a severely rebated rim so it fits a bolt head designed for the 7.62×39 mm cartridge. Bullets are .500-inch, the same as the .500 S&W Mag.,

The .50 Beowulf bullet is half-inch in diameter and can expand to more than an inch. Compare that to a 55-grain .223 Rem. at .224-inch. The 300-grain Beowulf has 627 percent more bullet weight and an unexpanded diameter that is larger than a .223’s fully expanded bullet. Expanded, the Beowulf bullet has a 123-percent larger frontal diameter than the .223’s expanded bullet. The Beowulf has almost three times as much muzzle energy as the .223 Rem. and more than four and a half times the momentum. This is a serious step up in power for the AR-15 platform.

Additional information

Weight 2.00 lbs
Dimensions 6.0000 × 3.0000 × 3.0000 in

2 reviews for 12.7x42mm (AKA 50 BEOWULF) 500gr XTP-20 ROUNDS

  1. RP

    This is a heavy bullet great firing bullet and pretty accurate.

  2. Wulfster

    This load is for the big bad boys that loves big guns! and they are very accurate .

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