Very interesting Jaro. It is easy to concentrate only on gaining poundage and distance but the accuracy side is important as well. With the time, materials, and care that go into creating a good war arrow (felling a tree, splitting, milling by hand, planing and tapering, splining and shaping nocks, fletching, wrapping, gluing, sealing, and smithing a bodkin) it seems unlikely that archers would just shoot at random unless they were firing into a mass of people.
I'll post a little more when I have a chance to shoot a few arrows at those ranges for accuracy.
J. D. Duff