I understand that many police departments are switching from .40 S&W to 9mm. Basically, modern 9mm defensive loads are just as damaging as .40 cal and can pass the FBI's Ammunition Test Protocol. Also in actual police shootouts the miss rates are around 70%-80% so having more (equally damaging) rounds is a great advantage. Other advantages of 9mm are less recoil thus faster followup shots, cost, and less wear on the gun. So is the .40 cal on the way out or am I missing something?