Can anyone give a a good reason why the .40S&W has become so unpopular? It used to be so popular and now there is a lot of negative feedback on it. I think it is partly because the Clinton Gun Ban is over and people can get higher capacity in a 9mm. Also 9mm are more effective now than they were 10+ years ago. Any other ideas? Maybe ammo cost? I don't think it is so much the .40 being bad as the 9mm has gotten better. Wanna kill these ads? We can help!