Originally Posted by
Wondering Beard
Spinmove, where are your sights after you break the shot, both live and dry fire?
Do you perceive any movement in where the front sight is as you are pressing back the trigger?
The reason for my questions is that I wonder if your trigger pull might be uneven (as in it moves where the gun is pointing as you break the shot). Maybe you're snatching the trigger when you think your sights are dead on? A good way to check for that, I believe, is in checking the follow through phase and that may tell you things.
As to thumbs, a high flagged thumb (with some tension, not just floating there) is good for enabling the shooter to move the gun as little as possible when pressing the trigger, but it isn't great for recoil control. A locked down thumb is good for recoil control but makes it harder to get a clean trigger press. That's for one handed shooting of course.