Given that your 22 brief magazine has no markings it is not from Winchester. I haven't viewed a 22 limited magazine which was not the exact same outdoors dimension as 22lr mag. I can’t visualize how a mag, like you described, could probability be secure when inserted. A photograph can https://highimpactrounds.com/product/winchester-super-x-270-win-150-gr-power-point-2850-fps-20-rd-box/