Update -
It works. I shoot 10 times at 17 yds. at a one inch 10 ring and count as good any shot within a two inch diameter (so, a 5 inch diameter circle). I hope that makes sense.
My avg. was 7 until I focused on bow arm stability. 8 became my avg. Then, a few days I hit 9 and would fall back to 7 on a bad day. Progress for sure.
I never could hit 10 of 10 because ( I assume ) pressure would build in my mind and I would flinch on # 6 or #8. That would relieve the pressure and I would hit the remainder most days.
Then I stumbled into a "phenomenon" that caused me to shoot 10 of 10.
I was winterizing my lawn mower by letting it run out of gas 6 feet from where I stand to shoot. Loud.
I decided to multi'task and shoot anyway.
You guessed it. 10 0f 10! It felt like I was detached from the whole process because my senses were suppressed by the noise. Felt like I was watching someone else shoot my bow. I suppose because I couldn't hear the arrow slide across the rest, my bones and ligaments groan during the draw, I was free from distraction.
Addition by subtraction.
Makes me wonder about athletes using ear buds, etc.
Anyway, I've been trying the 10 of 10 for about 4 yrs and finally did it. ( A smart guy would quit right now.)