are you right handed? if so you may be not getting enough finger on the trigger and pushing the weapon a little. Try with an unloaded weapon (make sure to check). Find a spot on the wall and aim to it. Then squeeze the trigger like you have been. and watch the point of aim to see it move.

You might want to get some snap caps and practice dry firing the weapon. The thing is. where on your finger you are putting on the trigger has a lot to do with how you shoot. too much and you can pull, not enough and push. The 5.5 lb pull and longer travel on a Glock you can see a movement that can throw off your POI. Being you are consistently grouping well but in the wrong spot points to improper trigger pull or other reason for jerking or pushing the gun a little.

Thanks for the advice DevilsJohnson. I am heading to the range again this weekend so I will give it a try.

Does anyone have any opinion on the aftermarket grips I listed above?

I use the Pachmayer slip on #1 for my G26

I was doing the same thing truman565 when I first got my Glock 23. My son pointed out to me that I was not getting my finger onto the trigger enough. I have to concentrate to make sure I have my finger deep enough into the trigger guard and it shoots fine then.

Me I'm thinking that the grip is too big for my hand. Adding a sleeve onto it would make it that much bigger. I want to send it in to Bowie Tactical Concepts http://www.bowietacticalconcepts.com/index.html
and see if they can sculpt the grip similar to the grip of my Sig P229 - which handles great.

Just a thought.