You're probably going to have to see that repeat a couple of times, without any scope setting or firing position changes, before it becomes a puzzle worthy of solving. As a 1-time thing, it could be as simple as air currents. I do kinda see a trend downward until 50 which is one oc those split groups that I usually attribute to hold and/or body shift. But its waaay to easy to "see things in the tea leaves".
