Considering the fact that your 22 brief magazine has no markings It's not necessarily from Winchester. I have never witnessed a 22 small journal that was not the identical exterior dimension as 22lr mag. I am able to’t imagine how a mag, like you explained, could risk be protected when https://highimpactrounds.com/product/winchester-defender-segmented-slug-12-ga-2-75-in-1-oz-1600-fps-10-rd-box/