I suppose that like the .22 WRF, it will chamber in the .22 Magnum..and will fire, but may not be as accurate as the .22 magnum.
Looking at the cartridges pictured, they seem to be somewhat crude..especially in the crimp area, so I wonder just how widely they were used at the zenith of their usage.
Depending upon diameter..they may fire in a regular .22LR rifle that has a long enough leade (e.g. Stinger).
Obviously a good 'capture' by any cartridge collector.