The .308 Winchester (7.62×51 NATO) is simply the most popular short-action big-game-hunting cartridge in the world, capable of taking down just about any size game in North America with moderate recoil and accuracy beyond 1000 yards. The Dirty Bird 16″ .308 Complete Upper is built with accuracy and maneuverability in mind, which is why we went with the following components: Ballistic Advantage 16 .308 Win Tactical Government Profile Barrel Tactical Government Profile 416R Stainless Steel to maintain the highest level of accuracy 1:10 Twist Rate HP & MPI Tested