This is from a firearms and history guy i have red a number of accounts of bullets being deflected by objects such as badges, tree branches, bones ect. In the book "The file on the Tsar" it does mention a case where a corset stopped a bullet and saved the wearers life and i believe i have red another incident where this did happen. During the American civil War more than a few soldiers lives were saved because a bullet was stopped by a pocket bible, a deck of cards, a piece of hardtack ect . They called this "wounded in the testiment". I can also say that bullets sometimes do strange things when they hit objects like the human body which even experienced crime lab people have problems explaining. If you want to do a test it might be a good idea to contact a US gun magazine like "Guns and Ammo" get them to help do it. If you can get a reply from them contact Tom Gresham on "Gun Talk"