Ive been working on my form with intense purpose to become a better shot. And my work through my form has brought me to a small revelation that might help you diagnose your form issues, especially if you feel you can't control your shot.
I will say that most believe that target panic or the build up of anxiety is a mental struggle, but I think in some, not all, there might be a physical part of the shot that may be causing the buildup of anxiety.
I have talked with Joel Turner and his concepts of concentrating on pulling is what put me on this road to a better execution of the shot.
Here is what I found out about my shot, I was anchoring, split finger with the middle finger in the corner of my mouth and index finger on my tooth. Sounds like a real solid anchor, and it was, but it wasn't an anchor that allowed my to get the drawing elbow just inside the string. I was at anchor but I was already in a creeping position. So at anchor I was struggling to keep pulling because I was fighting collapsing.
The struggling with keeping to pull was building the anxiety and you know how hard it is to execute the shot if you don't feel you are in control.
Long story short I worked on my anchor, I found an anchor that puts me in a stronger position, where at anchor I am in the best position to maintain the pull and struggle to keep pulling. I have added 3/4 of draw to my shot.
I can now draw, anchor and run my mantra till the shot goes off.
Incidentally I am anchoring on the cheek bone with my index finger and lay the rear of my thumb on top of the lower jaw bone. In essence I no longer anchor on the tooth which allows me to rotate the hand back.