I've been told just the opposite; that headspacing is critical for a consistent lockup of the action and that you don't want a "crush-fit" for best accuracy. You instead want brass sized down just below that level, so there is neither excess "rattle" nor "crush". Any truth to this? It would make sense. I will say that I ran some handloads through this new rifle that had been minimally sized for a .260 bolt gun I used to own and these loads did not shoot too well.
