"I wouldn't choose 10mm for CCW. Over-penetration would be a HUGE concern."
- The FBI pretty much called the "problem" of overpenetration a myth. They couldn't find many (if any) fatalities as a result. But this view changed my mind: over 1/2 of all rounds (police & civie) miss in gunfights. A .40 that misses will penetrate a he'll of a lot more than any overpenetrating 10mm.