In his book on custom cartridges, it's listed as having an length of 2.500. No loading data is listed.
Another cartridge that is even lesser known and almost exactly the same dimensions was built by Jack Lott called the .450 G&A Short Magnum. He used 80grs of IMR4895 and 82grs if IMR4320 to get 2200fps from a 22" barrel. It's main reason for existence was to use the existing bolt face and OAL of the .458WM and open the chamber up to the larger .404 Jefferey body to safely get 2200 fps from the .458. These loads were supposedly 200fps faster than factory rounds of the day. This data is almost 40 years old btw.
