I've only shot one elk and that was in AZ on a unit 9 tag. I shot it at 27 yards with a G5 Montec and it came out the other side of the elk after it went clean through a rib and landed 30 yards past it. The elk died within 70 yards of me.
The main reason I shoot them is due to how accurate they are for me and my bow. I've had some issues in the past getting good flight out of fixed broadheads.