Ya know, I've been toying with the same questions. Several months ago I had the opportunity to fire a friends Glock 20 and I was surpprised at just how much a pussycat that it was. I was expecting it to spin me around, knock me down and dig a trench with me. No not really!! It was loaded with a 180gr load and to me was remarkably milder in recoil than the .357 mag. 158gr. that I customarly fire with regularity. I say this to say that I'm not recoil sensitive. I carry a .357 snub and have been for some time considering an auto. I don't think that I'm interested in a 9mm but have considered the .40, the .357 sig, the .45 acp and the 10mm. As I understand the .40 is a water downed 10mm,.38 vs .357 mag. The .357 sig is a necked down 40 and sometimes have functioning problems. The .45 acp has been around forever and for a long time the king. Like Mr Mikul, (handle??) when is enough too much. Where does it end? A 20 kiloton nuke pretty well evaporates a large area so why a 100 megaton your just as equally evaporated. Is the 10mm a 100megaton nuke when the 45 calibre 20kiloton will do the job just as well or is 9mm MOAB (Mother Of All Bombs) equally as sufficient. So for now I'm still carring my snub nose .357. The whole point is to consistently hit what you're aimming at with enough kenitics to stop the threat or down the dangerious animal when in most cases the .38 spl will do the .357 mag certianly will do. One can study ballistics tables and test fire untill they are blue in the face and not be absolutely certian that they should be armed with ??????. Is the 10mm too too much or or or or. I have yet to find anyone who can say where the 10 fits. This thread just further stirs my curiosity. Very Very interesting!! Regards Pistol Toter