When Melvin Forbes started making his Ultra Light rifles in the late 80s, he sent me one to test for a while, a .300 Winchester Magnum, which shot great. That one was not for sale, so I decided to order one. Danced around with a few until realizing that what I really wanted was a .30-06, partly because I was doing a LOT of travel hunting then, and knew that even by some strange circumstance my ammo got separated from my rifle I could find a factory load anywhere on earth that would work. It was also very practical for testing new ammo and bullets, which sometimes occurred on "industry" hunts, because the first bullet most companies introduce is a 180-grain .30, and the first factory ammo they make is .30-06. Which is part of why I've taken more big game with the NULA .30-06 than any other rifle it showed up in 1996....
