It took an average of 2.45 9mm rounds to achieve incapacitation. It took an average of 2.36 .40 S&W rounds to achieve incapacitation. Some touted this as a great, decisive victory for the .40 S&W.

You see, the whole reason .40 was developed was to give law enforcement a more powerful pistol than 9mm. Yes, the .45 ACP was out, but .45 pistols were also very limited by capacity.

You see, the whole reason .40 was developed was to give law enforcement a more powerful pistol than 9mm. Yes, the .45 ACP was out, but .45 pistols were also very limited by capacity.