Field & Stream nominated the 30-06 as the best non mag. cartridge ever. If your .30 cal. "go to" gun is to be fed by factory loaded ammo I would go 30-06 over all others simply because of the cost. Its been around since ww1, since then its been selling strong at #1 most of that time. Their is no chance its going the way of the dodo unlike some of my cousins & uncles Super Duper Magnums.
With reloading ammo I really like the Winchester Super Short Magnums. They take slightly less powder than newer "efficient" non mags and produce Magnum performance. Whats not to like about that? :shrug: