Re: .357 Magnum Versus 357 SIG
If my memory serves, .357 sig and .357 mag were both in Street Stoppers, and according to this excellent publication, preliminary results yielded one shot stop percentages within a single point of each other. It runs in my mind that .357 magnum achieved a 96 percent one shot stop, where .357 sig achieved a 95 percent one shot stop.
Unfortunately my copy is sitting 300 miles back home and not in my dorm so I can't cite it for sure. Plus there might be a newer edition of Street Stoppers by now, but in any case, I suspect that ballistically, the race between .357 sig and .357 Magnum is not such a clear cut issue.