And there are never any fluctuations in wind speed - - it always blows at exactly the same speed. Okay.
"Is this story for real?"
Good question. It really, really strains credibility.
I have no idea what the extent and magnitude of record keeping is these days, but it is natural for some exaggeration to creep into these feats after the fact ... kind of like how that big bass gets bigger each time the story is told.
But who cares? What is important is that two shooters got two verified hits "over near the horizon". That should be enough.
Or two kills at point-blank range, for that matter. That's the only thing that counts in combat. All the rest is for the war story sessions afterwards for those who will buy the beers to hear it. :)