Took third range trip today; saw definite progress (after plenty of dry fire practice and simply getting used to drawing and sighting) even through most of my 100 rounds today. On the last twenty, though, an oddity: Fired at one small silhouette slightly to my left. 10 shots, about 5 inch group ( I know, sad . . .). Loaded new mag and fired at same type of target, same height and distance, to the right. Missed the target on 6/10 shots . . . I mean missed completely. Angles were probably around 11 o'clock and 1 o'clock respectively. Anyone have an idea of what happened? Dominant eye issue? Did I have a damn stroke and didn't know it? Utterly confused. All shots were fired from ten yards.