Because your 22 small journal has no markings It isn't from Winchester. I have not found a 22 short journal which was not the identical exterior dimension as 22lr mag. I am able to’t imagine how a mag, like you described, could likelihood be safe when inserted. A photograph could https://highimpactrounds.com/product/aguila-308-win-150-gr-fmjbt-2750-fps-20-rd-box/