Friday, weather permitting, I am heading the range and working up loads as I shoot. I also plan on just shooting at 200 yards. Maybe start at 150 if it is cloudy since I have a hard time spotting those little .22 holes at 200 if the light is wrong
Changing variables before you start may cause you to "lose" the problem without knowing what it was that caused it to go away. If it were me, I'd shoot several shots at 100. Then I'd move to 200 without changing anything including my aim point (I don't remember the chart exactly but you should only be 2 inches or so lower using .223 unless you are running an unusual load). Fire several more shots. Check the group. Then adjust the scope to 200 and shoot another group. This process should help identify where the wildness is coming from.