Re: 270 win fusion ammo for elk?
In my opinion, avoid them. My brother-in-law has shot an elk and a deer with them with his 30-06 and they both ran away with little to no blood trail.
We found the elk two days later, 4 miles from the shot, dead. Poor penetration and terrible fragmentation. The deer was dead but over two miles away and it passed clean through with a 30 cal exit hole. Both shots were high in the lungs. I guess the end result was a dead animal, but that's a lot of tracking to do.
Just my experience with them. Take it for what it's worth.