My son wounded a buck he shot while it was running. It was close, in a field and not running wide open. And, even though he had not practiced running shots, I thought he might connect. He did but the hit was bad; broke the back leg and went into the paunch. We did not know the details at the time or that the wound would have ultimately been fatal. However, I felt it was a gut hit from the reaction. We went back to camp, waited a while and took up the trail, both of us with rifles this time.
We were spread out in the woods working the track down a ridge when I noticed the deer running straight away at about 150 yards through the trees. Scope on 3X, rifle comes up, found the deer and touched the trigger. No reaction. Keep in mind, this was relatively thick timber with only a few openings to shoot through here and there. We continued the trail and about 100 yards later we found his buck. My shot entered just forward of the hip, passed through the gut and liver. Not ideal but remember the deer was running away.
At any rate, because of the shooting I did with you, I was able to help him collect his first buck. That was priceless. By the way, I was using a New Ultra Light Arms (NULA) rifle just like the one I used at Gunsite but in .243 Win. Bat was using the NULA in .30 Rem AR.
Thanks for your tutelage! Hope all is well.