Welcome to the forum, can't go wrong with either of them. I hunt with Diamondbacks in 308 and 6.5. both will do the job. i'm partial to the 6'5 for hunting. but it has limited ammo for just plinking where the 308 has numerous. I would say if you're going to have just one to hunt and target shoot with, the 308 would be the better choice. Then maybe later you can get a 6.5