On Friday (10/20/20) I shot a mature buck at 85 yards with a 350 Legend, 170 grain bullet. The deer hit the ground and flopped around. I watched him do this for 8-10 seconds then he got up and ran off. I found the spot where he flopped but no hair or blood. I heard him run into the woods and make a lot of crashing noises. We looked for 3 hours and never found blood. Anyone ever have this happen or have any suggestion of what happened?