There's a lot better elk rounds than a .260. I have little doubt that it will do but most everyone has a .30-06 as well!

IMO the .260 is a deer and pronghorn round suitable to 400 yards in the hands of a skilled shooter. IMO 120 grain bullets are great for this task.

If you must shoot elk with it, get some 140s and keep the range to under 300 yards.....

The little 6.5 rounds are truly amazing!