I was thinking about a .300 Win Mag, till I shot one. OUCH! So .30-06 is about the upper range of what I can shoot comfortably, and that's more then enough power for me. Plus, I'm planning on getting a M1 Garand, so same dies to reload with. But I can put more powerful 'hotter' loads in this because I don't have to worry about a gas system.
Did you know that a group of baboons is called a congress?
That explains a lot actually.