What to do: 375 Dakota Brass

[Rez Exelon]

So I recently picked up some 375 Dakota brass...mainly because I found it and I know it's a unicorn and just on the off chances that it'd help me on my 416/404JEF issues. I know it's based on a 404 Jeffery parent, but it's shortened way to far for that to be of any use to me on that project. Are there other cases derived from this brass?