I don't know here, I have made the same shot on different deer and see them react differently. In my experiences I have shot one deer through the lungs (double) and it would go 30 yards and done. The next deer with the same double lung would go 60 yards and done...I suppose thats where "will to live" comes into play, However the only deer I have seen in my harvest's that will live longer will be single lung shots,I have nevershot a deer double lunged, that I didn't pack my stuff and go get my animal.