The Model 72A had some re-built elements, notably a reliable lifter; the earlier a single was split. Model 72s experienced no pull-bodyweight adjustment screw as is discovered over the 69As. 22LR, not for the 69A’s .22 S, L, & LR. I assume this meant that the chambering and rifling ended https://highimpactrounds.com/product/winchester-aa-xtra-lite-12-ga-2-75-in-1-oz-8-lead-1180-fps-25-rd-box/