50 BMG – 660 gr FMJ – Federal (XM33) – 50 Rounds

Shooting a 50 caliber rifle is a special event for most owners, and quality ammunition is a big part of the experience. This listing is Federal American Eagle 50 BMG 660 grain full metal jacket ammo, MPN XM33C, sold as 50 rounds. The XM33 designation reflects its similarity to the M33 ball round that has served in the Browning M2 machine gun for generations.

Federal lists this load at 2,910 fps with 12,413 ft-lbs of muzzle energy. The heavy 660 grain FMJ bullet carries enormous momentum, holds velocity well, and gives long range shooters a forgiving trajectory on steel and large targets. It is a ball round for range and long range shooting, not a match bullet built for extreme precision and not an armor piercing or incendiary load. Expect real recoil and a large muzzle blast, so use good hearing protection and a solid rest.

This ammunition fits rifles chambered in 50 BMG, also called 12.7x99mm, including the Barrett M82A1, M107A1, and M99, the McMillan TAC-50, the Serbu BFG-50, the ArmaLite AR-50, and other single shot and bolt action 50 BMG rifles. A common question is whether 50 BMG rifles and ammo are legal everywhere. They are not. California restricts 50 BMG rifles, and some cities have their own rules, so check state and local law. Another common question is whether this ammo is the same as military surplus. It is new commercial production, loaded to a similar ball specification but without military tracer or API components.

Federal XM33C is new production ammunition, not reloads, made in the USA. Each round uses a boxer-primed brass case with non-corrosive priming, and the large brass case is a prized component for 50 BMG handloaders. This listing ships as 5 boxes of 10 rounds for 50 rounds total. At this caliber, a single lot also helps you get the most from your ballistic data on long shots.