The best choice when looking to take down that trophy buck, the Federal Premium ® Vital-Shok Ammunition offers incredible results on large, heavy game. Equipped with a 225 grain Barnes ® Triple-Shock X-Bullet in the 338 Winchester Magnum caliber, the Federal Premium ® Vital-Shok Ammo is capable of reaching muzzle velocities as high as 2800 feet per second. Reliable and accurate, the Federal Premium ® Vital-Shok Ammunition is sure to please any avid hunter.