The following table shows the rounds and number of arrows (dozens) per distance (yards) for G.N.A.S. (ArcheryGB) sanctioned rounds.
For example; A York round is 6 dozen arrows at 100 yards, 4 dozen arrows at 80 yards and finally 2 dozen arrows at 60 yards.
Please click on the link below to view these:
Imperial Rounds: archery-rounds3
Metric Rounds: Archery-Rounds-Metric-excel4