I think it's hard to say one is better then the other, as both are great. If you can't hit at 300 yards with a 308 then you can't do it with a 270. I love my 308 but know the 270's great also, so you really can't go wrong with either. One thing about the 308 is it can be found in a carbine with 18 or 20 inch barrels. If I already had a 270 and was going to get a 308, that's the way I'd go.