Your 11 is the same action as a 12.
You are over complicating things. Savage has TWO actions a long and a short, everything else is a variation off of that.

The target action is the same action as a 12 (or any other short action 10,11,12,14,16) it just has less machining done. They threaded it for a large shank barrel. The target action and varmint and sporter action is just terms that Savage put on them for who know why. Magnums (RUM, SUM) use the same action just with some different machining process. It is all the same.