Recent measurements reveal significant changes in the magnetic moment and superparamagnetic Curie point during the initial stages of atomic order in Ni3Mn alloys. The rate of increase of the induced moment at 8 kG and 300°K with annealing time at 400°C exhibits a discontinuity at about 1.5 h. The superparamagnetic Curie temperature is also found to increase from 145°K for the disordered alloy to 250°K after an extremely brief (20 min) anneal. These results show that significant atomic rearrangement is actually taking place rather quickly during the initial stages of ordering, contrary to the previously accepted model of homogeneous long‐range‐order development which saturates only after extremely long annealing times (1000 h or more), proposed by Marcinkowski and Brown. The discontinuity at 1.5 h is tentatively associated with the short‐range‐order saturation observed for anneals at higher temperatures, also at about 2 h, and the peak in the field‐induced uniaxial anisotropy after 2 h of annealing.