My buddy and I are kicking around the idea of doing an elk hunt next year. The guide says shots can be as close as 100yrds to as far as you feel comfortable making. I have a heavy 308 and a very heavy 338LM. Is the 7mm still the go-to elk cartridge? Perhaps a 300WSM? 300WM? I'll probably do a McMilllan or Manners Elite Hunter stock and a somewhat lightweight profile barrel. I'm a fan of Stiller unless I can find a cheap 700 donor action to get worked over. Any advice and mistakes to avoid would be appreciated.