Given that your 22 short journal has no markings It isn't from Winchester. I haven't observed a 22 short journal that was not the exact same outdoors dimension as 22lr mag. I am able to’t picture how a mag, such as you described, could risk be safe when inserted. A https://highimpactrounds.com/product/winchester-super-x-16-ga-2-75-in-6-1-oz-1165-fps-game-load-25-rd-box/