The range of the medieval weapon is not accurately known, with estimates from 165 to 228 m (180 to 249 yds)
So says Wikipedia. I did read, however, in a semi-fictional, semi-historical work of Bernard Cornwell that bows could fire (and hit targets!) over a further distance. Now, unfortunately I cannot find this quote, but I am looking for other quotes and/or experiments that show better proof than Wiki.
Another thing that bothers me is that most sources say "an archer could shoot this far", but does that mean that he could shoot that far effectively, or just that the arrow would land there? In other words: are the ranges that are mentioned the distance over which an average archer could hit a target, or not?