I have pretty much switched all my '308' type shooting to the 223 because LR ballistics is near identical.
I have been shooting 80gr Amax and Berger WELL beyond 1000yds so distance is not an issue. This is sub MOA accuracy if you can dope conditions.
Neither is good as a wind bucker and share the same needs to be a good condition doper. We all need to be if you want any plastic.
I have shot enough 308 to have a good idea on comparisons and I don't see any tangible wind drift reduction for the amount of abuse you put up with.
Just finished shooting with a guy who was pushing 175gr MK's right around 2800fps and he used the same scope adjustments I had for my 223/80gr set up (similar velocity). We shot out to 1300yds.
I just don't see how you could get accuracy from factory ammo on par with tuned handloads in any cal. For best accuracy, handloading is the only option for me.
The only real advantage the 308 gives you is a bigger hole in the target and when shooting score, that can add a point sooner or later. However, if you can't handle the recoil, you will just make bigger holes where they don't belong
If I were to shoot F/F, I would use the 223 and 80gr VLD's.
JimV, I really like the VLP laminated stock and consider it one of my favorites for a field varminter. Not as good as the BVSS for riding bags but then the BVSS is not as good as a field stock so.....
I like det mags especially if leaving the bench. If static, really whatever suits your fancy. They both work very well.
When the stock gets bedded properly, I would expect 1/2 to 3/4 Min accuracy to be very achieveable with 75gr Amax or Bergers over varget. These are bullets you can shoot well beyond 1000yds. As long as you load for reducing vertical dispersion, you can have as much fun as the scope will crank up.
As for using factory ammo, I can't say as I have not shot any factory ammo in many years excluding surplus 'rinco. The 223 needs a careful eye when adjusting powder charges for best accuracy. Some have had very good luck with Win white box varmint ammo but they tend to shoot close up.
For LR plinking, any of the Vmax, Amax and Bergers up to 75gr VLD will get the job done.
The furthest I have seen a factory savage shoot was out to a mile. Didn't have the loads as dialed in as possible but it definitely made the trip.
Jerry