I have the Pelican 2-gun case and it is quite sturdy. I don't think you'd be able to lever more than 2 guns in there, however.

Within the last 4 - 6 months, there was an article in "The American Rifleman", by Jeff Johnston, I think, testing and rating several airline cases. (I recycle my back issues pretty quickly, otherwise I'd offer more information from the article. But if you have access to back issues, it was not a bad writeup.)

Jeff Loth