I have both a 7mm RM and a 270 Win. I reload for both. I've seen elk taken with both. And deer. And of the two, I lean toward the 7mm RM. Sure, the 270 will get the job done, but of the two, I believe the 7mm is superiour. Bigger, heavier, faster bullets. But there is a price. Recoil is much sharper and they are more expensive to shoot. Plus the 7mm guns are generally heavier.