Found this on Rimfire Central:
I believe that the Remington metal, curved, Mdl 511 magazines can be made to work with some modifications, if the OP has a Husqvarna Mdl 1622. However, there is also the Husqvarna Mdl 622 and 1722 .22RF, bolt action repeaters, and I don't know what may, or may not be made to work for a magazine in these rifles