In N/A, If a Rifleman can get within 400 yards, he can kill it w/ a .270 Winchester.
And if he can't?
In either case, he's not much of a hunter.
GR
580 yards is my longest kill with a .270 Win 130 grain SGK on a plains mule deer. Worked just like you'd expect it to when slipping a bullet through the heart and lungs.