Have you read what Chuck Hawks has to say about the 400 Whelen, or 411 Hawk? His clarification of it's origin, with the completely unsized 30-06 case, and the correct establishment of the shoulder for headspace? It makes perfect sense to me and has really made me want one, but it's still more dream than reality for me right now. I would think it would work well within a standard length action and be a real hammer for nearly anything. I have to question his velocity claims, but maybe I just need more education.
In reality, it probably wouldn't do anything that already established cartridges can't, but it would have to be a very interesting project.
If I were just sitting around with nothing to do and had lots of extra $$, I'd have to have one.
BB