I just got my very first Savage Tactical 110 6.5 Creedmoor. When I removed it from the box and looked at all of the components that came with it, something stuck out about the PMAG 10. It said on it '7.62 X 51'. I was thinking my rifle only took 6.5 Creedmoor ammo. Is 7.62 X 51 an alternative ammo for this rifle? Thx!