That is very unusual , I would say you got lucky. My 223 needed 6.4cm on the y axis and 4.8 on the X while my 243 is Y=3.2 and X= 8 cm . Its not precise as the "clicks" are 1.5cm but not bad and they seem to correlate well from a measurement off the shot target. I had a bit of an issue with repeatability , taking it on and off but sorted now.
The cluster in the center is the last 5-6 trials.
Apologies for running the thread off topic a little.
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