I have been told by three different recurve/longbow pro shops that for as long as they can remember the Easton Arrow chart has been wrong for selecting hunting arrows for your recurve & longbow. They have all said that whatever Arrow Group the chart indicates you should pick from that you need go down (lighter) at least one Group or even two Groups to get the proper arrow weight for your recurve/longbow.
The Compound chart may be perfect, but this post is referring to recurve & longbow hunters. The chart may also be right on for target shooters, but is for another posting.
Since the 70's I had been shooting 2018's (Group F) per the Easton Chart and with some advise started shooting 2016's (Group D). I can get the same kinetic energy as I did with the 2018's by increasing the tip/broadhead weight yet the arrows fly MUCH, MUCH, better.
I did not see Easton as one of the sponsors here, so would be curious to see what others think of Easton's arrow chart for Recurve & Longbows.