Have you ever looked at Ken Howell's line of wildcats based on .404 Jeffery brass? I have one barreled to his .416 Howell. I haven't as yet played with a lot of loads yet. But so far, it's a pussy cat.
It works well with a standard length Mauser action, the case length is right at 2.5", it didn't take a lot to make it work from the box magazine.
This rifle will finish up under ten pounds. No scope on it yet (not sure I want a scope on it).
Something to think about.