Yes it is, and the only .338s in its class are the .338 RUM and the 378-338 Weatherby. The .50BMG gets used for shots past about 1800 meters, but is used for closer in when needed. It is considered an anti-material round, but rifles and rucks and load bearing equipment are all material. We never shot the big 50 at people. We always shot at their equipment. Clothes, magazines, mortars, helmets, vests, etc. I was usually behind a Ma Deuce. Max effective was supposed to be 1720 yards, but it'll do a lot better if you have a good spotter.