Savage offers a single shot "sled" that fits firearms that use Savage pattern centerfire mags.
It is not compatible with guns that use AICS pattern magazines, obsolete stagger feed models, or any rimfire models.
Please be aware the adaptor in not caliber specific- as long as you purchase one that matches your action length and magazine latch system, it will work with any caliber.
For more information please see the link below:
Single Shot Adapter Converts Savage Into a Single Shot Rifle