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So, I don't know if this your situation, but yesterday at the range, two gents were shooting at 5-yards and consistently hitting low, left. I suggested they not squeeze their fingers when they pull the trigger. This was pushing their shots low and left. When they made a conscience effort not to squeeze their fingers when the pulled the trigger, their hits were center and higher. They had a little trouble with compensating for muzzle flip, but I got them back on center target.

Small guns require adjustments to grip compared to larger guns. Easy to develop some inconvenient habits. If you had gun vise, you could tell if the problem was PEBT (Problem Exists Behind Trigger) or is the sight alignment.