bobster, a 9mm is a pretty tame caliber in the grand scope of things. You maybe be thinking the old .45. The government and police force went to the .40 cal which is a 10mm. Slightly smaller than the .45 but much harder hitting than the 9mm. When engaged, too many after hit shots were fired by the bad guy when the 9mm was use. With the .40 much less the case.