Note: the question applies to both pistols and long guns.
So, I've never had much use for chamber flags, but I see that Jerry Miculek seem and Paul Howe both seem to be fans so that got me thinking about using them; mainly for firearms in the safe and during any administrative handling on the bench.
Do you use chamber flags? Why or why not? If you do use them, in what capacity/scenarios are they used? Protocols for use? Lastly, are some chamber flags better than others? Recommendations?