The Model 72A had some re-developed elements, notably a good lifter; the earlier one particular was break up. Model 72s experienced no pull-fat adjustment screw as is located about the 69As. 22LR, not for your 69A’s .22 S, L, & LR. I suppose this intended which the chambering and rifling https://highimpactrounds.com/product/winchester-super-x-270-win-150-gr-power-point-2850-fps-20-rd-box/