The 6.5mm Creedmoor is a centerfire rifle cartridge introduced by Hornady in 2007 as a modification of the .30 TC, which was based on the .308 Winchester. It was designed specifically for rifle target shooting,although it is also achieving success in game hunting. Bullet for bullet, the 6.5mm Creedmoor achieves a slower muzzle velocity than longer cartridges such as the 6.5-284 Norma or magnum cartridges such as the 6.5mm Remington Magnum. However, due to its 2.825 inches (71.8mm) overall length, it is capable of being chambered in short-action bolt action rifles and AR-10 semi-automatic rifles.
This is a medium power cartridge often compared to the .260 Remington and 6.5×47mm Lapua. Three hundred yard energy using 129 grain Hornady SST bullets is listed by an independent reviewer as 1641ft. lbs.For the 140 grain bullet at 2700 feet per second initial velocity another reviewer reports an MPBR for a six inch high target of 265 yards and reports a manufacturer claim of “almost 1600 ft. lbs.” of retained energy at 300 yards using a 24-inch barrel. SAAMI test data confirms 6.5mm Creedmoor (fifteen feet from muzzle) velocity of 2,940 fps for the 129 grain bullet and 2,690 for the 140 grain bullet (which compares to .300 Winchester magnum data of 2,930 fps for a 200 grain bullet and 2,665 fps for a 210 grain bullet).Long-range shooter Ray “RayDog” Sanchez summarised the bolt-action Tubb 2000 rifle in 6.5mm Creedmoor as “boringly accurate” at 1000 yards (914.4 metres). He asserted the rifle and ammunition combination he used was able to maintain sub-MOA groups at 1000 yards (914.4 metres).