Re: Conflicted. 284 or 308 build on Sav SA
I've taken the 208 Amax to 2700+ in the 308, though I don't recommend it. 2600 is reasonable and getting 2500-2550 is easy. With that in mind, it'll run with the 260 albeit there is a lot more recoil involved but it'll get you into FTR and have superb barrel life. You can run 168-178s for practice as they don't punch you as hard and you'll learn more about wind doping.
My vote is for the 308.
Long range shooting is a process that ends with a result. Once you start to focus on the result (where the shot goes, how big the group is, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.