Here's a link to a thread on officer.com, it'll give some perspective on what cops think about carrying a gun with an empty chamber. Some of it is kind of funny and the thread wanders here and there, but it is easy to see where they stand on the subject. What is good for them (us) is good for all you CCW holders, too!!
"Cops aren't supposed to carry with one in the chamber." - Police Forums & Law Enforcement Forums @ Officer.com