I have a sig sauer p226 chambered in 357 sig. First of all, I love this gun, I have always loved sigs and this is the best I have owned yet. I am a huge fan of the 357 sig rounds; however, they are expensive and hard to come by. I have been thinking of doing the 357 to 40 conversion and was wondering if anyone had an opinion on it. Also, as far as I can tell the conversion is simply switching out barrels, or am I wrong? Thanks for the help.