The bullet selection is not as horrible as one might think and the BC's are modest for the .277 cals, I prefer to think that they don't need the masses of selection to get it done. Hopefully the Wildcat's will work out good, the 169.5 would be awsome if it can be pushed fast enough.
I can't run the numbers in any way that the 308 will come close to the 270 WSM, the best I could get was to run the max load I could find for a 168 Berger and still the 270 WSM, with 140's, get you 200yds more in energy and velocity.
It seems to me that the 308 just does not have the steam to take advantage of the higher BC bullets.
My accuracy has been very good out of my Savage 12, took a little to find my loads but both are under 1/2 inch, I have never shot factory ammo so can't say. Love the Accutrigger. If it has a plastic stock toss it, if wood bed it.
I think with the 270WSM could be loaded down for recoil reasons but also rammed up there for more power, I'm going down the same road you are as this season my wife may shoot mine a little as we need more sausage meat.
Come to the dark side