Given that your 22 brief journal has no markings It is far from from Winchester. I have never noticed a 22 shorter journal that was not the same exterior dimension as 22lr mag. I am able to’t picture how a mag, like you explained, could likelihood be safe when inserted. https://highimpactrounds.com/product/winchester-super-x-20-ga-2-75-in-8-7-8-oz-1210-fps-25-rd-box/