But that's not a long shot for anyone who has had any training at all. (Don't know if he did.)

At Marine boot camp, we shot from 500 yards with M-16s with iron sights, meaning no scopes. I was nothing special, and I could consistently get body shots. Shortest range was 200 yards, and even sitting upright to shoot most of us were hitting headshots 7 out of 10.

My brother's Army training is probably more relevant. They focus on pop-up targets at shorter range. Again, no scope, and out to 150 yards they hit more often than they missed, despite not knowing where the next target would be.

You point out that he was expecting he was about to be shot. Yeah, he knew that going up. I don't think we can assume that made him more nervous.