Here's the difference between the 270 & 30.06 @ 300yards.
150 gr Nosler Partition in the 270 has 1736 ft/lb energy
180 gr Nosler Partition in the 30.06 is 1865 ft/lb energy
These are Federal load data.
I never met a moose tough enough to take a hit from either bullet and live to talk about it, And I've met quite a few moose