My buddy was shooting way left, 4-8 inches from target center, with lots of vertical movement. My shooting was after he got frustrated. I started coaching. He has cokebottle glasses, with prisms and, yes, he is left eye dominant. He shoots revolvers pretty well, but hasn't like the slide of a semiauto coming back in his face. Revolver grip. So, we worked on stance (NPA), grip, follow through and, the hardest to get through was don't hold your breath and fight the aim for 15 seconds. If you don't make the target shot in 5 seconds, bring gun down and off target and start over.
He got a little better. My shooting picked up more as I was coaching.
![Very Happy :D](./images/smilies/icon_biggrin.gif)