I am very interested in this, but not for the cartridge itself. The possibility of using the unprimed brass has my attention.

A case of 1.8" with a 30-30-sized rim is good news for folks who'll wildcat it in into other cartridges. Take the 6.5 Bullberry IMP, for example. Necking down in a full-length die will render a case that needs little to no actual fireforming since a shoulder won't have to be blown forward as with conventional 30-30 brass. Then, too, the brass should finish up near the proper length and negate the need of heavy trimming chores.