extractor/ejector; the 22 lr has rim diameter of .275 and the 22 wmr is .291, so see if it will fit or can be easily modified to do so. the little rossi we have neatly and very briskly ejects the 22 lr case.

i suspect it will work. and afterwards you can take a fired 22 wmr case, cut it off at its base, removing the rim, and then insert a 22 lr cartridge into this sleeve and still use it in your little rifle. [ this is a jim taylor trick, i did not invent it. ]

on that little gun you could do it yourself by hand. i had a 22 wmr reamer but cant find it [ since moving ] but midway has them for 39.99

http://www.midwayusa.com/product/764673/ptg-solid-pilot-chamber-finish-reamer-22-winche...

this is cheaper than having it done; i have done one in the past, was pretty easy even for mechanically challenged me.

If you scroll down to comments on that item, there is one Paco in Tucson who gives it a hearty thumbs up...