I have used both expandable broadheads and fixed, I used fixed for 8 years before I switched to expandables, I lost an elk that season, I think because of lack of penitration, the arrow from what we could tell by the hit, wacked a rib bone and really did not sink or pass like I have experienced with fixed blades. I am not saying It was a great shoot by any means, but I expected more performance from the expandable. The ease of tunning in my mind is not worth the risk!
Just my Opinion.