I did the same thing a few years ago. Drilled a buck, dropped in his tracks, I was gathering up my stuff to leave the blind as it was getting dark, and I looked up to a see him bounding away, seeminly unharmed. There were some hairs and a few smal drops of blood. I tracked him for a mile and half and then I could no longer tell his track from the other ones and he had crossed a river, so I think he was doing pretty good. Touch break though none the less.