Watched the Vid but failed to spot anything that refuted what I wrote. It was more about variability of muzzle velocity both actual and read. The dispersal of small errors at 100 metres to larger ones at longer range is simple mathematics.
One thing I have noted for fixed focus scopes is the tendency to shoot slightly better groups, measured in MoA at 200 metres compared to 100. I've put this down to parallax. The principal reason many, including me in the past, have trouble shooting decent groups at longer range is too small an aiming mark.
Regards Grandpamac.
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