The Model 72A had some re-built components, notably a stable lifter; the prior just one was split. Model 72s had no pull-pounds adjustment screw as is discovered to the 69As. 22LR, not with the 69A’s .22 S, L, & LR. I think that this meant that the chambering and rifling https://highimpactrounds.com/product/winchester-super-x-308-win-180-gr-pp-2620-fps-20-rd-box/