They give you about 300 yards more supersonic flight with less recoil than a 308. My attraction to a 6.5 Creedmoor, over something like a 300 Win Mag, is that under the right conditions and using a muzzle brake, you're supposed to be able to watch your own vapor trail at long range. I'll find out if this is true in about a month when I take mine to Arena.I want to try one at some point. A lot of people like them over the .308 ballistics. I'm up to my elbows in .308 rifles.