The 7.62x51mm is a full-power rifle cartridge used in military and law enforcement applications. It is a rimless, bottlenecked rifle cartridge that was developed in the 1950s as a replacement for the .30-06 Springfield. It is a popular choice for long-range shooting and hunting. The 6.5 Creedmoor is a relatively new cartridge that was developed in 2007. It is a rimless, bottlenecked rifle cartridge designed for long-range target shooting and hunting. It is a popular choice for precision shooting competitions. The main difference between the two cartridges is the size of the bullet. The 7.62x51mm uses a .308 caliber bullet, while the 6.5 Creedmoor uses a .264 caliber bullet. The 6.5 Creedmoor is also more accurate and has less recoil than the 7.62x51mm.