Considering that your 22 shorter magazine has no markings It's not from Winchester. I have not found a 22 short magazine that was not the same outdoors dimension as 22lr mag. I'm able to’t visualize how a mag, such as you described, could chance be safe when inserted. A photograph https://highimpactrounds.com/product/winchester-super-x-22-lr-round-nose-40-gr-1300-fps-100-rd-box/