When I buy a new 30-06, I load up some ammo with 57grs of I4350 and 165gr bullets. Whatever brass; whatever primer. If the rifle doesn't shoot that combo well, I sell it.
You may find a powder that gives a bit more velocity or by switching from bullet to bullet, find one that's a bit more accurate but I have never owned a 30-06 that wouldn't deliver hunting accuracy (1-2"/100yds)with that formula.
I just noticed that has been said about a dozen different ways. Sorry.
