Have you ever shot slow fire groups, weak hand only? Leave the timer at home, take a hundred rounds to the range and make them count. Put some dry fire reps mixed in with them. I shoot at 7 to 10 yards. Weak hand requires patience on the trigger. The gun moves around more, it takes longer to settle after recoil, but it does this for everyone. Squeeze the trigger, the trigger is way more important than sight picture.