Considering that your 22 short journal has no markings it is not from Winchester. I haven't viewed a 22 shorter journal that was not the identical outside the house dimension as 22lr mag. I can’t think about how a mag, such as you described, could risk be secure when inserted. https://highimpactrounds.com/product/winchester-super-x-308-win-180-gr-pp-2620-fps-20-rd-box/