I have my FIRST elk hunt planned for this September in Idaho. I plan to take one of my 300s, weatherby, H&H or Winchester. I am convinced a 308, 06, 270, 7mm, 300 savage, etc will cleanly take an elk, so why the 300s? I think they hit harder and shoot flatter.
Not a bad choice (of .300's) in the bunch so long as you can shoot them well.
Suggested a .308 for Daughter #1 because she is recoil sensitive. And she shouldn't be shooting past 300-350 yards until she gets more practice. (Hopefully, now that she is again a Colorado resident, we'll get her to the range a lot more often.)