Thanks for commiserating with me. All rimfire shooters have shots that go elsewhere rather than where they should.
Does anyone else see the increasing trend to the right in that sequence of groups?
Even when targets are levelled on the backer and the scope is properly aligned, sometimes targets may have some groups that appear to change their POI relative to one another. The causes of this are another discussion.
The same target posted above is shown below with vertical lines from the point of aim. Readers can judge if the groups tended to move to the right -- other than the outlier on the last group, that is.
As for an explanation for that last shot, I'm not sure I have one. Of the twenty groups I shot with this ammo, Midas +, none had similar outliers. At the same time, even top tier ammo can have a flier in a box. Today, however, this ammo gave only one sub-.2" group of the twenty. On other days such groups have been a little more plentiful.
The slight breeze that came and went yesterday morning might have kept the ammo from doing its best. I could hear the leaves rustling in the trembling aspens that grow in abundance around the range, and it seemed to grow louder as I was finishing the target. That too could have influenced me in some way. On reflection, however, those trees are noisier than most and the breeze probably didn't come into play enough to push a round out by that much. In the end, I knew the target was one of my best, and there was an undeniable sense of growing pressure that can influence performance. But I can't say why that last shot didn't go as expected.