Last time I took a HSP D3 Vehicle Darkness Course we did bullet testing thru the windshields of the cars I had gotten for the class (I was hosting). Everyone got to test their carry ammo of choice thru it with a target directly at the front of the vehicle. Of all the various carry ammo tested, Corbon's 115gr all copper bullet (can't remember the official name) did the best with the least amount of divation thru the windshield. 124gr HST and 124gr Speer Gold Dot tied. What I'm referring to here is those bullets had the least amount of POA/POI shift when traveling thru the glass. The WORST performer was Hornady Critical Duty and Critical Defense ammo. The target was literally 4ft away and didn't even touch the cardboard.