I'd never make a move on one arrow. You can't always call a bad shot. I go by the rule that one arrow could be an accident. Two arrows in the same spot could be a fluke. Three arrows in a group at the same spot is a trend. So, I shoot a minimum of 3 arrows at each distance and go for group. Then I adjust to move the groups into the same line.

You have to stay within the distance where you're confident of shooting good groups. It that's only 40 yards for you, then that's fine. Being able to shoot tight groups at 60 yards only means you can dial the tune in to that much of a finer edge.