Thom, your thinking is also mine, in fact I wrote that "
is said to have trown at 536 meters".
Even if I'm prone to accept that an exceptional bowman, armed with an exceptional bow and an equally exceptional arrow, could reach such a distance, I also think that this result would be an unicuum.
Experimental archaeology's purpose is this: to confirm or deny some suppositions, or to create completely new ones.
We have proven that a 65 pound English longbow can thrown a 26'' arrow (with goose low and long feather and iron bodkin arrowhead) at a maximum distance of 180 meters, which is not so far than the distance these bows were said to reach.
But it's not that distance, and this means either that the tradition is wrong, or, more probably in my opinion, that we are 1) not as trained as a Medieval professional archer, and/or 2) using a longbow not as powerful as the ancient ones.
The most beautiful thing is that we have to keep shooting arrows, which mean a surplus of fun

Greetings,
Mauro.