I am fully aware of all you stated. I have an X-frame 500 Smith and Wesson and do not hand-load. Buffalo Bore 500 JRH brand is what I will purchase and use in my double-action revolver. I would prefer 500 Smith and Wesson magnum brass cut-down as I want all empty cases to eject with authority, when the revolver is inverted and the ejector-rod is activated.
A moon clip set-up would solve the issue of uniform ejection definitively, but that is cost prohibitive for me at this juncture. All sauce for the goose as the saying goes.