I am shooting Lapua 30/06 brass formed to 280 AI, neck turned, 55-56g of H4831 with Berger 168g vld hunting, Federal 210's were best(shocked) shoots groups no larger than two bullet holes side by side. There is a 5g spread from 55-60g where the largest group is .400 or a tad better. Gun is a rem 700, non trued, 26" X caliber barrel, #5 taper with a Gentry muzzle break. Groups are less than 1" at 300 yards. 168g Hunting Vld is picky in that it likes to touch the lands in this barrel(PTG Match Reamer).
I would not encourage anyone to go the Lapua 30/06 case route on this cartridge unless you like to tinker as neck turning will be required for extreme accuracy. I am not sure the pay off is there, but I have a flock of once fired lapua brass given to me which is why I chose that route.