I've stayed stock. I agree with Ranger17. I prefer to practice with live rounds. Dry fire will tell you that the gun wiggles when you pull the trigger. Duh! It wiggles before you pull the trigger. It wiggles differently while you pull the trigger. It wiggles differently after the trigger breaks. Dry fire won't tell you what direction you wiggle. It won't tell you how the wiggle will affect your POI.