This could almost be a thread. 6 of my 8 are within a shot of each other. My 7th is 2 shots worse than my best, my worst is a rogue 4 shots away, I need to get rid of that one ..
My "8 from 20" are all within 3 shots of each other. That surprises, but encourages me!
In our cases our HI is most definitely accurate, a very even line on a graph .
The next question, how do we break that ceiling in order to go lower? Have we plateaued? Interesting stuff.