“French police trying to stop the truck that inflicted all the carnage in Nice fired many rounds at the driver,” gun guru John Farnam writes at ammoland.com. “Many did not penetrate doors. Many did not even penetrate the windshield! Most were pistol rounds of course, but when my rifle comes out, I want to be in a position to get inside vehicles with bullets. In my 5.56×45 AR, I have a magazine filled with Cor-Bon 62gr DPX. Unlike 55gr hardball, DPX goes through car doors!” Time to change your rifle ammo?