While you are at it, you might try running 3, 4 and 7 shot groups. That will let you compare average group sizes for different numbers of shots. I published my results a few years ago, and it would be cool to have the results duplicated.
The stats for group size are nasty. I couldn't see any way to do it except by simulation, as you have done. When the going gets tough, the tough resort to simulation.
That’s funny, true but funny. 👍
