You can swap out for a mag bolt head but Savage uses CRF for short mags and I think you may need a center feed mag configuration for that . I have an older long action I was going to use for a 7 WSM but its a stagger feed and I don't thing I can use a controlled round feed with that. I could be wrong though I would like to know for sure as well.
You can get a magnum push feed bolt head that will work. I think they machine down one from a long action. Call Kevin at stockade and he will hook you up. But if you have a long action then all you need is the magnum bolt head. I have one on my PTA and I got it from stockade.