I know people that can jump a deer and shoot it on the run. I have never been able to do this. If a deer takes off at a medium trot its safe around me because I can't find it in the scope. I've tried practicing this with both eyes open but I tend to lose sight of my crosshairs with both eyes open. So how do people shoot deer on the run? Whats the trick?

Even if you are able to get one in your sights, do you lead it or aim right on? Do you hold the gun at a spot that the deer will pass and pull the trigger when he comes into sight or do you follow him with the scope?