Originally Posted by SGTCap
If you're trained properly there is no reason to walk around with an unloaded gun. A pistol with nothing chambered is a really expensive rock.
Being able to rack a slide with one hand may be a crucial element in staying alive when one hand is incapacitated or injured. There is lots of history where those that were not able to reload when injured died. I suggest you practice it with an unloaded pistol.
Regarding carrying a round in the chamber, many agencies prohibit it. That is, of course, is a professional response to the question based on actual street experience.
As for me, I choose to not carry a round in the chamber which has been my practice for over 40 years now. While there is a lot of talk in computer forums about out drawing an assailant actual occasions where there isn't time to charge your weapon are very few and far between.