A few months ago I went to the range with my buddy. I brought my m&p and he brought his 357 mag. So we get to shootin and he used to worked for a glass comanpy and had some ballistic glass. So we set it up it had already had a few 357 slugs in it. So I shoot t with the 357 and watched as it stopped the bullet, the 357 travels around 1300fps so I knew my 40 wasnt gonna go thru. I loaded 5fmj and 5 jhp cause I wanted to tryn recover a slug or 2. I let it rip as my buddy stood beside me. He was focused on the glass and didn't see me et hit. The 40 came stright back striking my colarbone. At this point I actually saw the slug. After the inaital holy "cow" moment I found the slug haha. I've only seen one other ricochet actually strike someone. It does say use catioun when shooting hard surfaces, all I know is I got wicked lucky an inch to the left and it woulda been my throat and it might not have ended with a sore collarbone for a few days and a cool story..I've seemed to have miss placed my slug when we moved. And though he quite often offers we don't bring the ballistic glass anymore.