Thanks to everyone who voted. The results are a little surprising, but when you think about it for a minute, it starts to make sense. The .380 ACP came in first with 16 votes, followed closely by the .38 Spl with 15 votes, then the .357 Mag rounding off the top three at 13.
The .45 ACP at 10 votes and the 10mm at 9 both beat out the 9mm with 7 votes. The.357 Sig came in last at 4 votes and the .40 S&W was second to last with 5. Even the .38 Super beat out the last two with 6 votes.
The .380 is understandable, a lot of people carry around those small pistols in their pockets and want to know how they may perform. The .38 is in much the same boat, small, lightweight and still very popular. The .357 on the other hand is kind of a surprise. I know and see people daily who carry or use firearms, and none of them use a .357.
I think people have seen enough of the 9mm to get an idea of what works, and that explains why it came in as low as it did.