Considering that your 22 short magazine has no markings It's not at all from Winchester. I haven't seen a 22 quick magazine which was not a similar outside dimension as 22lr mag. I can’t picture how a mag, such as you explained, could risk be secure when inserted. A photo https://highimpactrounds.com/product/winchester-super-x-270-win-150-gr-power-point-2850-fps-20-rd-box/