What do you feel is the max range I can use this load?
I feel the max range is how ever far you can keep all your shots in a 10" paper plate, while shooting from field positions.
Getting the bullet where it needs to go is 95% of the deal. That Hornady bullet can fail horribly on you (very doubtfull), but as long as it "fails" in the lungs of that Elk; your still going to be eating Elk steaks.
So the answer is: Go somewhere where you can shoot a LONG ways out, and find out.