I have heavily calloused hands and it seemed as I had more contact in the upper and lower of trigger which shifted as I pulled the trigger instead of the center of the trigger. Also I had a fair amount of both side to side and up and down play in the factory trigger. Installed a Caspian trick trigger Sat night,Much better side play and almost no up/down now. The pad of my finger is now able to depress the trigger much cleaner. Just shot it,MUCHO BETTERI'm sold on it.