RE: 80 yard shot!
It can be done, but usually not by your average archer. I used to shoot at 70 meters, Probably shot around 5 inch groups on a good day. I'd have to see the kid shoot to see if I really believed him or not. If he had poor form and didn't shoot that well at 20 yards you could pretty much assume he was full of it.
Shooting that well at that distance takes some commitment and regular practice. I would not even ettempt it now that I don't shoot as much. Sometimes you have to make some minor adjustments to your set up for long range stuff as well. Like moving the peep to a different location to compensate for the rise when you hold over. It's not always that easy to have a bow that will shoot well from 20 to 80 or 90 yards. Maybe if it was really fast.
Paul