What kind of situation are you envisioning that would require more than the five rounds in your revolver?
I felt that more than five was unnecessary (I pocket carry a five-shot snubbie), until some months ago, I read an account of about 14 attackers harassing/robbing people on a city bus. If
they all run, or are not armed, five shots should be enough. However, if they did not all run, or some were armed, a "plan B", just might be warranted.