One thing I did was to adjust my trigger so it was very light and gradually get back to a little bit of a heavier trigger. The light trigger will give that surprise release that you are looking for and, depending how much you practice, give the screw a half turn once a week. Your finger tips have more nerve endings than any other part of your body so you can feel the slightest movement in the trigger. I also don't use my finger tips, I wrap my finger around the trigger so the trigger is touching just behind the first knuckle, I notice trigger movement much less doing that.