i replaced the windshield, i would have got pulled over while driving if it didnt get fixed.. I got the bullet and casing still. THe primer looks perfect. The bullet was one year to two years old. I couldnt figure it out either. I dont know either, but its pretty tough to brake a windsheild-easy to bust up a face. I just wanted to see if this happened to anyone else????I dont keep them in vehicles any more.