I gave up on using hard cases to transport my firearms. Cumbersome, bulky, and "low density." I now carry a Voodoo Tactical 42" double gun bag (which I can carry a max of 3 rifles plus 2 handguns) and a bail-out bag of ammo. My "regular" range load is 2 rifles plus one handgun.
The rifle bag can be "backpacked" easily over your back, sling the ammo bag, and you're good to go.
My hard cases are for storage. Check out the Plano AW Tactical series. You can find them for as low as $70-$80 if you look hard enough, and the quality is "good enough"