Obviously, the impact shift would be greater as the distance increases and/or the wind speed increases. It might be worth noting Praslick’s intended audience, who are primarily service rifle high power shooters who are trying to hit a 2 MOA ten ring at 600 yards. In this case, the Berger 80.5’s have a difference in impact of 1.1″ due to a 14fps tailwind. All things considered, the tailwind can be ignored.