6.5 Grendel VS 300 AAC?

[Rambozo]

I have been looking at the numbers and the AAC shoots a 125 grain 7.62 projectile at 2250 FPS producing 1405 foot ponds out of a 16 inch barrel while the Grendel shoots a 123 grain at 2650 FPS producing 1917 foot pounds from a 24 inch barrel.

To me that seems that if I am using the Grendel in a 16 inch barrel that I am going to be getting about the same performance from either round. Dose that seem to be the case to any one else?

No. Performance only appears equal superficially. Both bullets of similar weight will not have the same BC due to the difference in diameter. All else being equal, the smaller diameter bullet will have the higher BC. The higher the BC, the better the bullet will carry it's velocity. That means that the 6.5 will do better at further distances.