The Model 72A had some re-built components, notably a reliable lifter; the prior just one was split. Model 72s had no pull-body weight adjustment screw as is found within the 69As. 22LR, not for that 69A’s .22 S, L, & LR. I believe this intended the chambering and rifling ended https://highimpactrounds.com/product/winchester-defender-segmented-slug-12-ga-2-75-in-1-oz-1600-fps-10-rd-box/