Hard to go wrong with a 180gr for the .300 WM, I would stick with a stout bullet incase you hit an elk in the shoulder. A Partition in either 180 or 165 should get the job done but the 180 has just a little more punch and only drops an additional 2" at 400 yards. Nosler made the 180gr protected point partition just for the .300 WM. It shot great out of my mdl 70