It didn't shoot where he wanted it to, but since he had no idea about his group size, the 50 yard shot (though perhaps unlikely) may have been on the outer limits of his current group size. If he hadn't adjusted the sights, maybe it would have been 15" off at 50. I agree it would have to be an unusually large "group" (basically all over the place) to be dead on at 25 and 10" off at 50, but without knowing what size group, it's possible....especially if patches are blowing completely apart, for example. Also...one shot at 25 is not a group. Maybe "dead on" was a one-time anomaly...a slight pull at the time of the shot, or whatever.