This question has been posed to me a number of times from my customers throughout the years. There have been a lot of opinions expressed  regarding this subject and I thought I would toss my hat in the ring for what is it worth. When I first became a officer for the City of Los Angeles back in 1973, we were issued a 38 caliber  K frame revolver, and a wooden night stick. Add to that twelve extra rounds and that was it. No pepper spray or taser and or hand held radios. Fast forward to now and you will find an array of tools available to law enforcement and civilians that offer more choices on how to react in volatile situations. One upgrade, namely the high capacity auto handgun such as the Beretta 92 have allowed a officer or citizen  a leg up so to speak in dealing in situations involving the use of deadly force. However, the carrying of a  high capacity auto handgun comes with a price. My opinion is that it can give   a individual  sense of inflated confidence. Although the thought that more is better, sometimes that is a hinderance in employing good tactics. When we had only revolvers, we knew we had only six rounds before we had to reload so therefore we had to have acute  awareness of our surroundings, i.e. cover.  Unnecessarily placing ones  self in the open was a no-no tactically and doing so  meant a high possibility of being seriously injury or death. The point I’m alluding to is that although high capacity autos are a great tool to have for self defense, please be aware of the feeling of  over confidence as all it takes is one bullet coming your way to wreck your day no matter if you are carrying a flintlock pistol or a machine gun.