Being that you have a 300 win mag, you've probably already got a large shank. The diameter of the barrel doesn't necessarily mean that you need a new shank. I went from a pencil barreled .270 to a Heavy Varmint barreled .260 Rem and both are small shank.
I'd call Savage and provide them the serial number and they can tell you what your specifications are. Then just have your new barrel made to the same specs.
Bookmarks