I recently bought a Glock G20 10 mm. Despite all of the reports I heard about the 10 mm recoil being excessive, I have no problem with it.........except after firing about 100 rounds my trigger finger, the fleshy part that contacts the trigger, was moderately sore. Almost like I had repeatedly whacked it on something sharp or rough. I've fired thousands of rounds with other handguns and never had this happen. I checked the trigger and there is nothing sharp on it. What am I missing?