I have most the common calibers in handguns and even a few not as common, but farily mainstream calibers. I've recently started researching wildcat calibers and other odd ball loads. I think some are great, and others started out with good intentions, but fell short on delivery. I now own 5.7x28, .357 sig, and 10mm (I love the 10mm). I am planning on buying a 22 TCM when I can get one in anything but rock river, and am very interested in the 40 super. I'm curious as to what else is out there. I want everyone to tell me what is their favorite and why. Why are some dinosaur obsolete poor performers still so poplular (like the 45 ACP). Help me pick my next oddball.