Why on earth would you keep your handgun loaded with snap caps.
They came with the gun when I bought it a few months ago. I've been leaving the magazines full of empty cases in an effort to relax the spring a bit as it is nigh on impossible to get the last (10th) round in from new. I chucked the snap caps in simply as a way to carry them! As I said, it's been through Brisbane airport many times without an issue, it's just not something I'd thought of as a concern.
Not sure what it's like in the States but our screening and security people don't carry firearms in the airports over here, only the Aus Federal Police do and they're only at the larger airports.