I was curious about the "conversion barrel" idea. I am in the market for a G32 or G33 and was just about to purchase a gen3 G32 with many extras all original parts and a .40S&W barrel from a G23 (I think that is correct, the compact .40 equiv. to the G32) The seller said that if I wanted to shoot .40, I only had to switch out the barrels. My question is, rather questions are; Is this true? Is it just between these two models and calibers? Many have said to buy the .40 compact and get a .357sig conversion barrel. What is the difference? Can this be done with the subcompact platform too? Are there any issues with other chamberings and the .357 platform recoil springs? The reasoning for buying a .357 platform and not the other way around is that when I carry defensively I want to carry .357sig and all stock parts. (I never want to be on the opposite end of a "he loaded a more potent chambering..etc...) The conversion to .40 is purely because of it's abundance at the range and overall less cost point. Also, I have studied many charts on recoil energy and read and heard many people's first person opinions. Is the recoil felt less from the .357 platform than the .40? many describe the .40 as snappy. I have no .40 experience, my experience with G32's is that the recoil is crisp and smooth. Thanks for the help!