Honay - I can't tell you the specifics about rim diameters and case lengths but I'm sure the gunnut69 (moderator in Gunsmithing Forum) can provide those. As to the Richards Microfit stock - it took me six months to get my stock from them after the order had been placed, and if they don't have one cut for your Savage action in stock it might be a while before you can shoulder your project. Mikey.