I'm sure it has been done already by somebody, but I have not seen any specs or data on such a creature. It seems it would easily outrun the 350 Rem Mag. It looks like it would be very similar to Rick Jamison's line of wildcats, which include a 35 caliber and several others based on the 404 Jefferys case.

It has been done in Australia and is called the 35 Sambar. Not sure of results without checking up but this has been covered previously. Could try doing a search of this site?