The other day I was working with a guy preparing for a school, trying to help him build his foundation skillset and looking for any obvious technique issues that could be easily addressed. Right-handed shooter.
Aside from the not unusual low hits resulting from a bit of an anticipatory flinch (depressing the muzzle before the shot was fired, fighting recoil before it had even occurred), he also had some hits noticeably off to the right
on the targets.
He was using a thumbs-forward grip, and his trigger finger placement seemed proper (for his finger length & placement on the trigger), but I was finally able to see his left thumb flinch, tighten up and press inward, directly rightward
against the front of the frame. When this happened his POA was significantly off to the right
of the intended POA.
We discussed the role of his support thumb when using a 2-hadned grip under different conditions, and we found a way for him to prevent his support hand thumb from interfering with his grip (not pushing against the frame as he completed his trigger press and unconsciously anticipated needing his support thumb to help hold the gun still under recoil).
His right-of-center hits stopped happening right away. He was surprised by how easily he'd been unknowingly causing the "problem", and how easily he could consciously correct it.
Then, of course, I told him that he had to continue to consciously work to "undo" the bad habit he'd been working hard to ingrain into his support hand thumb, until he could avoid doing it at the unconscious level.
Just like the rest of us.
Now, we've got to work on that anticipatory flinch that drops his muzzle before the recoil even occurs.
Got someone who is either a very experienced shooter (with known good skills), or an instructor, who can observe you while you're shooting?
Once you've correctly identified any existing technique issues, or even just sloppy habits that could be improved upon, then some carefully structured dry-fire practice can often help you start to ingrain the new techniques so they become habitual.
There's still a need for live-fire, of course, as knowing there's no recoil about to occur
is a different thing than having your startle-response kick in when you know
there are impending recoil forces.
Just some thoughts.