Due to the fact your 22 brief magazine has no markings It is far from from Winchester. I have never observed a 22 small journal which was not exactly the same exterior dimension as 22lr mag. I'm able to’t visualize how a mag, like you described, could chance be safe https://highimpactrounds.com/product/winchester-aa-12-ga-2-75in-1-1-8-oz-8-lead-1145-fps-25-rd-box/