Been there, done that. But in my case it was a 10 mm that refused to fire at the range and I happened to stash in one of my cargo pockets on my shorts. I made it through OKC Airport without a problem. Vegas Airport, on the other hand, was a little more thorough. Took a good bit of explanation to get through security that day.Just don't try to carry on a live .223 round stuck in a side pocket that you missed when packing said carry on bag. Raises all kinds of alarms. Don't ask me how I know.