I was target shooting over the weekend. Same place as usual - woods behind house - no development for a few miles - very remote place. It's mostly soft sand pines and same scrub oaks with a small clearing for my make shift range. I was shooting my M&P40 at a target about 25 yards away. A friend was standing about 5 feet behind me. One of the bullets dropped about 3 feet to my back left. My friend saw it drop and at first thought it was a renegade shell casing that went wonky in direction. After firing, he looked and it was one of my bullets. This was of concern as I've never had a richocett (spelling??). Is this something to worry about? Anyone have similar issues? My guess is the bullet hit something that went sent it upwards and it just happened to drop behind me?