I was reading about these competitions and how a practice group is shot that may be low, left/right, etc, and then a target for score is placed, approximately centered, under the practice group, and a single shot is made on several different targets for a total score. My question is, why aren't these guns grouping to point of aim, but instead grouping low/high, left/right, etc, or do most and I have the wrong impression? Thank you.