I work as a correctional officer here in Texas. Sometimes I look into the crime history of the offenders here and I see that in the majority of felonies committed by the armed felons locked up in here were using small handgun calibers such as .25 ACP, .32 ACP, .380, 9 x 19mm. According to the US Department of Justice website their studies concluded that the 9mm Luger was used more widely by armed felons to murder police officers than any of the so-called "assault weapons". What I am trying to understand is why these armed felons prefer the smaller handgun calibers?