The problem, and trade-off, with gun cases is you pay for the protection in weight. The poly ones are really thick in order to get the strength, and it adds up. My Boyt is about 24#, but indestructible. If yours is down at 16#, it sounds like an aluminum one. My ICC-1 with the locking rod is 16.5#. The lightest double cases I have seen are the Browning Mirage line, and you can get them down to about 12#. My partner has one of those, and we have never had a problem with the airline gorillas, but you never know???