One thing not forget regarding elk medicine and the 270, is a handload using a 160gr Nosler Semi Spitzer Partition. I have used it for many years in my 270 Win and it ought to be a sweet load in a fast handling 270WSM in the dark timber.
My load is 2700fps, not a barn burner by any means, just a throughly trust worthy, easy on the meat hunting load. Always punching a nice 3/4" to 1" bore hole through the elk. Leaving a excellent blood trail, the animal is always on the ground very quickly.
My first kill with the load was a bull running through the timber broadside. I hit him higher than I would like, square in the shoulder blades. It punched a 50 cent piece size hole thru the shoulder plates, thankfully it hit the spine too. I learned my lesson, but I also learned that I could trust that bullet.
Don