I haven't weighed the case separately but it's fairly heavy. If you were going to backpack this you wouldn't carry all the crap I put in mine. (and you could use a smaller case.)
8x20 2D (modified) 17#
300mm Metrogon 6#
600mm Apo Ronar 3#
420 Apo Nikkor 1#
4 Filmholders ?#
Dark cloth ?#
Meter ?#
2D Extension rail 1#
Filters ?#
Misc ?#

Loaded case 70#

I've also got 15# of a Gitzo tripod that's not in the case.

That's why all this stuff is on wheels or in the truck.