I agree with robocop10mm!! My father inherited a Winchester model 90 in 22 short. Essentially a .22 gallery gun with octagonal barrel et.al.!
He had it re-chambered to .22 LR and lost the collectivity. That rifle today would have been worth around $2000, as it is; about $500.
Keep it original, look for something else to shoot with a more common round and buy the WRF when you find it!!
50 round boxes .22 WRF are available at Cabela's for $10.99 http://www.cabelas.com/p-0012674214493a.shtml