I have only killed deer with two broadheads, G5 montec and rage 2 blade. My bow did not shoot the montecs the same as my field points (tuning issue), so I had to adjust sight for the broadhead. The rage, even with my poorly tuned bow, will hit the same as my field points at all distances I've tried.
I have only killed one deer with the rage 2 blade. It was a slight quartering to shot that entered behind the shoulder and exited in front of rear leg. The blood trail wasn't great because the exit was plugged with intestines. The entrance cut was very impressive, probably around 4 inches (don't ask me how it cut twice the broadhead diameter).
The way the rage is designed, I don't see how it could fail to open unless one has clogged the ferrule with target foam or accidently shoots the blue practice head at a deer.
The 2 blade I shot the deer with had bent blades because it stuck in the ground, which was hard and rocky. I don't think the rage heads are very durable like some fixed blade broadheads, but they seem to do much more damage to soft tissue. The entrance cut with the rage was 3 or 4 times bigger than what I got last year with a similar shot using montec.