There's rifles shooting as good as or better than current benchrest ones whose receiver's only trued up such that their face and the bolt face is square with the barrel tenon axis in them. There can be a small angle between the bolt way and bolt axis to the chamber axis; doesn't matter. It's repeatable and stays the same for every shot fired.
US Navy Distinguished Marksman Badge 153
Former USA Palma Team Member
NRA High Power Long Range High Master
NRA Smallbore Prone Master