Back when I was so poor I had only 2 big game rifles they were a 270 and a 30-06. I killed elk with both but preferred the 30-06. Trying to figure out why other than the 30-06 gave me exit holes more often.
I am not sure a man would ever "need" more than these two cartridges for any North American game. 180's in the 30-06 and 130's in the 270. You will have a flat shooter, deep penetrator, and enough overlap between the two to always have a backup.
However, talking about need is totally inappropriate on the fire.
