Whitey,
It may not work,but the rifle does seem to have the original Krag safety. To ID the caliber,it is best to make a chamber cast,but you can get some initial info from the bolt face.The Krag rim is considerably larger than 22-3000,so the extractor and maybe boltface would have been modified.In addition to 22-3000,wildcats from 30-40Krag and 30-30 were used,as well as 22Hornet.If it has a 1922 barrel, the bullet dia.won't be the standard .224". It looks like you will have a lot of fun with this rifle.
Mike