The author has his points of view and says...
Accuracy
With a lighter bullet, you generate more overall speed, which means a straighter trajectory.
This makes lighter rounds
excellent for longer-distance shooting because they will give you closer groups downrange. (??)
One thing to watch out for, though, is wind. Because of the lighter weight, these bullets can be blown off course more easily.
And below that he says... But, on the flip side, the extra weight gives the bullet more stabilization against wind gusts.
So those points are correct. But, IMO his interpretations are off a bit.
While many long-range shooters use heavier weights some like the Palma shooters use 155 gr.
My .02