I spent some time shooting my Bow with two types of broadheads on my arrows,Grim Reaper and Montec fixed stainless heads. I got a little close to one of the Montecs with the Grim Reaper and was surprised to see the Grim Reaper had sliced off one of the edges of the Montec head. No wonder the bone and flesh of a deer does not stand a chance against a broadhead the way they will even cut metal on impact. Just thought I would share my accidental findings.

That is EXACTLY why I have used the GR's since they have came out and have never looked back!!! I have over 100 deer, 50+ hogs and a near world record, (1-3/8ths short of the then record). I have not lost one animal to them and have never tracked one over 125 yds, even on less than ideal hits.
I used a Mathews Q2 at 64lbs, Blackhawk Vapor 4000 arrow and 100grn GR. I now shoot a Mathews Drenalin at 65lbs and Gold Tip Velocity 400's and still the 100 GR's. You won't be looking for another broadhead.