How big was the target?

The olympic airsoft is at 10m. The pellets are 4.5mm and the bullseye is 11.5mm.

This would similar to hitting at target with a bullseye of 57.5mm or 2.26" at 50m. Adding in greater inaccuracy of the bullet due to wind, etc... say a bullseye 2.5".

When I was a teen on the ranch in Montana and shooting was my main form of entertainment, I could do it easily. Today, I would be lucky to clip the edge of the paper until I got a few thousand rounds of practice in. It's about form, breathing, trigger control and a hell of a lot of practice.