A .270 is a heck of an elk killer. You just dont use 130-140 grain bullets. Uh oh wait a second, i made a mistake on not using a 140gr bullet on elk!
DOH!
http://www.youtube.com/watch?v=Ou_99tpO5pg

The other gun in the video that cant hit anything was a 30-06

I know for a fact a .54cal firing a 230gr .530" round ball with an 80gr pyrodex rs charge will cleanly and quickly kill an elk at 140 yards, i did it and the internal damage it did to the lung was amazing.