hate to bust your bubble, but I would go out on a limb and say the 30-30 may have killed more. 
That may be, but all I'm saying is that there's no way that the ONLY caliber to kill more elk than the 270 is the 338. What about the 06, 30-30, 300 winny, the 7 mag. 270 is the only one? No way.
Damn 30-30 should be on there.