I carry a USP at times which meets your criteria
As I have stated before I couldn’t change if I wanted to - if I drew my pistol out with one in the chamber the first thing I would do is rack the slide on the draw and throw one out on the floor
Since the consensus is I’m already one round down by not having one in the chamber that would put me two rounds down
So no probably not
only if you didn't replace one in the mag after you loaded the weapon...you seem to be adept at understanding cause and effect...so I stand by my troll comment.