Thanks for the report HVACGuyOk, so I just got back from testing my new 320c in .45 at the range. I will say that when it functions, it does so quite well. Unfortunately I'm going to have to polish the ramp and extractor. I had several FTF's/not going into battery. The round would stick, and not allow the slide to come fully forward. This happened with a clean gun, switching between both factory mags, and trying 3 different types of ammo. I'm not going to give up on it yet, as when it does function is it smooth and very accurate. So, there it is. I'll update when I go back after modifications. My 320 in 9mm ran flawlessly.