[Bloody Sam Roberts]

My personal inclination would be a semi built around a 357 cartridge.

Smith & Wesson makes one. So does Coonan.

[Eagles6]

They are no doubt going to stick with 9mm for NATO capability.

That said, the FBI just completed a study on handgun rounds. With modern hollowpoint projectiles coroners and OR personnel could not tell the wound track of a 9mm from a .45 ACP and they found no discernible difference in wound ballistics, stopping power or terminal performance.

Hence the feds and a lot of PD are moving back to 9mm.