Considering that your 22 brief journal has no markings It's not necessarily from Winchester. I haven't noticed a 22 quick journal which was not the same outdoors dimension as 22lr mag. I'm able to’t think about how a mag, such as you explained, could risk be secure when inserted. A https://highimpactrounds.com/product/winchester-m193-5-56-nato-55-gr-fmj-3180-fps-200-rd-box/