The Model 72A experienced some re-intended pieces, notably a solid lifter; the previous 1 was split. Model 72s had no pull-bodyweight adjustment screw as is identified within the 69As. 22LR, not with the 69A’s .22 S, L, & LR. I suppose this meant the chambering and rifling were being made https://highimpactrounds.com/product/winchester-super-x-308-win-180-gr-pp-2620-fps-20-rd-box/