I use Pelican Vault "hard side" cases with cut it yourself foam, no pluck out foam for me. The first one I bought is advertised as two guns, it can accommodate three full frame 6.5" barrel revolvers if you cut the foam so the guns are upright. You could squeeze another one in but not much foam at all between the revolvers.

The second Pelican Vault "hard side" is not specifically described with how many guns it can hold. I bought this case going off the internal measurements. It accommodates six full frame 6.5" barrel revolvers and retains 2" of foam between the guns and also the sides of the case.

I like the Pelican Vaults, weather proof, multiple hasps for locks and they seal with a rubber strip in the bottom and a "knife edge" in the top. If you want to do a different configuration replacement foam is avaiable.

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U.S. Coast Guard, retired CPO