Might well have happened. It's not ringing a bell on my end, though. I know Rich Wemmer, the LAPD officer survival guru, talked about some cases of cops with 18 revolver rounds running dry in SoCal, and at least a couple doing the same with all 3 service pistol mags, at least one being a double stack Beretta. That was before North Hollywood, there may have been more in that incident.