Just curious, but why change calibers in winter? I understand that you can conceal a larger gun under a coat, but why change caliber? I see going from a G43 or G19 to a G17 because of it being easier to conceal now, but, if you really want to carry a .40 or .45, there are subcompact options in those calibers. I don't understand going from a shield to a 1911 or similar change.
This summer was the first summer that I really embraced the 9mm as being adequate. All handguns suck in terms of stopping power, so winter clothes just seem to make them all suck more. I know that it's baby steps, but carrying 9mm in the summer was big for me. It might be a while before I can wrap my head around carrying a 9mm in the winter too. Also, I have all of these .40s and .45s laying around and I love shooting the things. I have very good leather for my G23, so if I shoot it well and it carries well, why not carry it. Maybe I'll just stick to .40 year round. Hard to beat the combination of capacity, caliber and concealability for me when I look at the G23.