Get the 308. It is what YOU want, not what the gun dealer wants to sell you. There is a difference in recoil with the 308 being less. Accuracy is also better with the 308 in my opinion. Not to mention the shorter cartridge length. Stick to your guns and in the end you will be much happier about your purchase. Oh, and by the way, make sure your use very high quality bases and rings for that scope. Good luck.