50 Beowulf – 350 gr XTP JHP – Underwood (518) – 200 Rounds

The 50 Beowulf turns an AR-15 into a true big bore rifle, and Underwood loads it with a bullet that matches that power. This listing is Underwood 50 Beowulf 350 grain XTP jacketed hollow point ammo, MPN 518, sold as a 200 round bulk case for hunters and big bore shooters.

The 350 grain Hornady XTP is a jacketed hollow point designed for controlled expansion and deep penetration, and it is a proven choice for medium to large game. Underwood rates this load at 1,775 fps with 2,449 ft-lbs of muzzle energy, with a ballistic coefficient of .15 and a sectional density of .20. That is a massive, heavy bullet moving at supersonic speed, ideal for hogs, deer, and black bear in brush and timber.

The 50 Beowulf was developed by Alexander Arms to put true big bore power in an AR-15. It runs on a standard AR-15 lower with a 50 Beowulf upper, bolt, and magazines, and is also known as 12.7x42mm. A common question is whether 50 Beowulf can be fired in a 450 Bushmaster rifle, and the answer is no: the cases and bullet diameters are different, so only fire it in a firearm marked 50 Beowulf. With heavy .500 inch bullets, the 50 Beowulf is a short-range powerhouse best suited to hogs, deer, and bear inside about 150 yards, and its recoil is noticeably stouter than a standard AR-15. A 200 round case gives you enough to zero, practice with real hunting ammo, and keep a supply for the season.

Underwood Ammo 518 is new production ammunition, not reloads, made in the USA. Each cartridge uses a brass case with a boxer primer and is non-corrosive, and the boxer primed brass is reloadable for handloaders. Buying by the case also keeps you on one production lot, so point of impact and velocity stay consistent from box to box. This case comes in factory packaging as 10 boxes of 20 rounds for a total of 200 rounds of 50 Beowulf 350 grain Hornady XTP Jacketed Hollow Point.