For 20 some years my favorite elk bullet was the 180 grain Nosler Partition at 3000 fps (300 Win velocities). I shot my last two bulls with 168 grain Barnes bullets from my .300 Weatherby. One with a TSX bullet and the other with a TTSX.
Recently I've had good range results with 180 grain TTSX bullets at 3250 fps from my Weatherby. That's probably the bullet that I'll use for elk this year.