I carry a 4" gp100 either concealed or open. Don't have to worry too much about 100% concealment unless I'm going to Denver where open carry is illegal. It's not that it's impossible for me to conceal that much gun, but I'm not made of money for all sorts of different holsters just yet. I have a galco FBI cant holster and a galco vertical shoulder rig. The shoulder rig is the best way to truly conceal that much gun, although I think a strong side IWB would also work for me. Of course, being a student means that I also only have money for two guns at the time, and I thought it made more sense to get a full sized handgun and a pump shotgun, rather than a smaller handgun. The gp100 is a great gun, rugged and accurate--gets more accurate each week as a matter of fact--and could easily double as a club in a pinch. The 4" bbl allows the gun to come closer to maximizing the potential of the .357 cartridge than a 2" snubbie. I'm happy with the .357 cartridge, and I don't feel under-gunned with 6 beans in the wheel. Some of those JHP rounds can expand like all get out. If you're wondering about the SD potential of the .357, it's more about which round of ammunition you use than anything else. They say 125 grain JHP are the best SD round for the gun. I'm not arguing, but I also appreciate the extra heft of the 158 grain soft points. You can play around and see what works for you.