Under his Napoleonic Artillery section he says this:
"It should be pointed out that an individual human figure can't be made out much beyond a 1000 yards so that these effective ranges matched what could be targeted using just the naked eye."
Well sorry .. they were not aiming for individual men. They were using skip-bouncing type shots at long range with ball. The idea here is that they would see a GROUP of men, easy to pick out at over 1000 yards. Trying to learn how to properly skip the ball into the ranks of soldiers is no mean feat.
But it had nothing to do with aiming a round to hit an individual.

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Generalfeldmarschall Wilhelm Prinz Peters von Dennewitz
3. Husaren-Regiment, Reserve-Kavallerie, Preußischen Armee-Korps
Honarary CO of Garde-Ulanen Regiment, Garde-Grenadier Kavallerie
NWC Founding Member
For Club Games: I prefer the Single Phase mode of play. I prefer to play with the following options
OFF:
MDF, VP4LC, NRO, MTD, CMR, PR, MIM, NDM, OMR (ver 4.07)