I hear a lot about the popularity of the relatively new 6.5 creedmoor. For most hunting folks i don't understand why you wouldn't first look to the 264 winchester magnum? I am guessing ammo/reloading supply availability and price are the driving factors as the former is so popular now that ammo is much cheaper than the latter which is old and "outdated" with less supply and higher prices. Edit: After digging some more other than ammo prices i think AR-10 folks (& any short-chambered barrel build) looking for something smaller than .308 would look to this creedmoor (.264) as a great go between the .223 and .308. and probably helped drive its popularity. For bolt-action folks i am not seeing this creedmoor as the optimal choice but see this chamber all over the place on bolt-actions.