257 Roberts. Look back to APril 11, 1986 and the shoot out that occured between two bank robbers and eight FBI agents near Miami, FL. Even though one of the bank robbers had been hit eighteen times in the heart/lung area, he continued to fight for almost an hour, keeping the FBI agents pinned down with a .357 pistol and Ruger Mini-14, killing two of the agents.
The FBI agents were armed with .38 and 9mm caliber firearms. This prompted the FBI and many other LEO to go to the more powerful .40. It has again been proven in Iraq, the 9mm in not effective in stopping a man, the military is looking at the .40, but is currently pulling the old .45 out of moth balls and putting her back in service.
I packed a 9mm for more years than I care to remember, but today I am convinced, if my life is on the line, I want a .40 and prefer that to be a Sig. The 9mm may be OK in a pinch, but I would go for the .40 to ensure the safety of myself and family. :wink: