Well, it works for a friend. I looked at his Walther magazine and thought, hmm, that looks a lot like my Weatherby's. Sure enough, hold it in and it would feed. He bought two or three, cut new notches and they shot fine.
I don't guarantee yours will, of course.
By the way, a Walther PP .22 magazine works in a Walther 1936 Olympia if you narrow the floorplate to fit up in the extended target grips. Looks nice if you screw a block of walnut to the bottom to fill the gap, too.