"pie chart" showing aiming errors/bullet impact

full case load

New member
I've got a friend who is unhappy with the accuracy of his new handgun. We discussed different; ammo types/bullet weights/handloading etc. with regards to accuracy. I also wanted to show him that "pie chart' looking thing that shows bullet impact areas for likely operator error. i.e. gripping to tightly, trigger jerking, flinching, etc. but I can't find it in any search because I don't know what to call it. Anybody know what I'm looking for? Help?
 
handgun_shooting_symptom_chart.jpg
 
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