Well in my opinion .270 is not a good elk cartridge. I shoot a .06 at 180 or better grain in partition gold, which have massive killing power with great accuracy and range. If your friend is forced to go with your .270 I would suggest he pumps out at least 165 grain with a high quality hollow point such as the partition. I have seen guys nock down a elk with one well placed shot. I have also seen the majority of lighter loaded gun shoot track their elk 5 miles and 5 shots later to take their animal down. But nothing to say it can't be down. Hope you all have luck on the big game season this year. Remember special permits are due the 23rd, get them in.
Gamehunter