The Model 72A had some re-designed components, notably a strong lifter; the earlier a single was split. Model 72s had no pull-excess weight adjustment screw as is discovered around the 69As. 22LR, not for that 69A’s .22 S, L, & LR. I presume this intended that the chambering and rifling https://highimpactrounds.com/product/winchester-super-target-12ga-2-75in-1-1-8-oz-8-shotshell-1145-fps-25-rd-box/