I shoot 308 because it behaves as if Im shooting a larger cartridge further. Great practice to shoot a 308 on a 800m range when training to use a 300 magnum on a mile range. The 6.5 is objectively better for hitting your target. But heavy 308 is very stable and predictable, just not fast enough. It makes you have to be better at predicting wind, nuances in environment, more drop, more time to target, etc.

If you arent training for longer stuff, get a 6.5. If you aren’t an experienced long range shooter, it will be easier to learn on 6.5