I have two mags that seem to fit the same gun[ same outside dementions. ]one has "PB CAL 22SHORT MADE IN ITALY " on it and has a spacer in its nose for shorts. the other is for 22LR and has no markings it looks the same except for the short spacer and its a little longer, both of them have the cutout in the same location that holds them in. any ideas what they fit? DR.