I have a Tuffpack. The thing I like about it is that you can stuff the whole soft case right inside, or if you need to have a bipod attached, just tuck some clothing around your gun(s) and they ride safe.
You may not require this but; I brought back a fresh ostrich egg inside(!) the Tuffpack. With two rifles, in two gun cases, all inside the tuffpack case, a bunch of wadded up clothes and that ostrich egg.
I honestly don't know the limitation on barrel length, but it for sure will accomodate 30" barrels. Maybe more?
It isn't conventional, but it is tuff. Actually, rolling it through a terminal, it looks more like you are carrying golf clubs, than guns. Something to consider, in this age of restricted luggage allowances because the thing will hold considerable gear besides just a firearm.
Good hunting. LB