Here are the results of my testing yesterday at 25 yds for each shot size
1st number is pellets in a 3.5” circle, second is pellets in a 9” circle

#4 39 128
#5 61 204
#6 67 254

I also shot at 50 yds, but it didn’t seem to give any useful pattern. I wanted to shoot closer but there were people at the range and I couldn’t walk up closer.