One of the main issues with hard cases is weight. I've got a boyt double rifle case that weighs 26 pounds empty. Drop two 7 pound rifles and some ammo in there and it'll be pushing 40 pounds.
There are many smaller cases as well, but due to being a hard case they can sometimes be limited in terms of what you can fit in there. My smaller boyt pistol case is about an inch and a half too short to fit my disassembled AR, for example.
http://www.boytharness.com/inventoryD.asp?item_no=40005&CatId={B4A83AEB-C242-40C6-B374-8A4CFAF99EC5}
That's what I've got, and it's a fine case for the price. You could probably drop it out the back on the plane on landing and it would survive.
As a one-time thing it's expensive, but if you're going to be using it regularly I recommend it. Or even just if your scope is particularly fancy. $100 ain't so much compared to a $3000 scope for example.



























