Considering the fact that your 22 shorter journal has no markings It isn't from Winchester. I have never noticed a 22 brief journal which was not the exact same exterior dimension as 22lr mag. I'm able to’t picture how a mag, like you described, could chance be secure when inserted. https://highimpactrounds.com/product/winchester-m193-5-56-nato-55-gr-fmj-3180-fps-200-rd-box/