I certainly don't know everything about any of these two calibers, but I've always been interested in them. I also realize that comparing .357 sig with the 38 Super will most of the time mean comparing two very different platforms. That being said... At first glance, .357 Sig and 38 Super seem to be ballistically similar. Why do people prefer one over the other? Does one serve a role more effectively than the other (for SD purposes for instance). They can both be loaded pretty hot, and when pushed both can churn out some pretty impressive results. Why aren't there more competitors shooting .357 Sig? Why aren't there more 38 Supers in non 1911 platforms? Also, what's with 9x23? Is the caliber worth its limited selection of ammunition choices? Is it more powerful than 38 Super?