Wouldn't hesitate to use a .270 130 gr Nosler Partition on elk.
My smith/Winchester guru buddy has shot countless elk with the old 130gr. grand slam. He says, "that's the best bullet out there for elk hunting"... I say use whatever works best for you. However, I'm in agreement with rockchuck in using a 150gr. partition for the reasons he stated. My rifles also love the 150gr. partition, which sways my decision. At $16.95/bag, it's really hard to say no too
. I actually loaded some old 150gr. grand slams for my buddy to try on elk this year. His only big game rifle is a 270 Winchester. He's not "loony" like the rest of us