I have always had an itch to do a 25-35 AI on a single shot action. In between the 250AI and 257AI in performance which is a very good place to be. Likewise a 30WCF AI is close to a 300 savage and the 308 Win in performance. A pretty good all a rounder.
The zipper is perfect for a highwall but for a Hagn or Farquartson I would go Euro.
Check out some of these by SDH and drool.
http://www.finegunmaking.com/