Personally me I would keep it. It is a cool little bit of history (mainly because I like old guns), it was free. You probably might not get much out of it do to the limited ammo but I would buy some shoot it bigger out what shoots the best. Then buy a few boxes here and there. Keep it and have fun plenty of energy to harvest a deer out at 150 yards even 200 yards.
Here is some ammo:
http://www.wikiarms.com/search?q=250+Savage&caliber=
Hendershots loads bullets from TTSX, Awift Aframe, Ballistic tip, Accubond, Partition, GMX, Spire point, Interbond, and Scirocco II.
https://hendershots.net/product/250-...e-custom-ammo/
If you reload here is a website for brass. If you don't feel like re-sizing 22-250 brass.
http://www.grafs.com/retail/catalog/...roductId/25337