In field ballistics programs and some device for current environmental data help eliminate a lot of, "what just happened."
Nice buck and great story!
At that range (750-800 yds), when the elevation, temperature, barometric pressure, and angle of fire have all changed from your sight-in range, I agree that the in-field ballistics program and a Kestrel (for determining station pressure and temperature), would go a long ways towards minimizing the error built into doping the first shot correctly. If the deer is standing still. The walking deer (moving target) adds another substantial dynamic variable to doping the shot correctly. And in addtion, will the deer maintain the same steady rate of motion from the time the bullet leaves the bore until arrival at 800 yards.
Enjoyed the Thread and the picture of you with your buck.