The charts seem to indicate the optimal feed rate, which is close to the max feed rate. It is all based on production and getting the most out of your cutting tool before it wears out or gets too dull to cut. I always started by hand feeding slowly and increasing the feed rate until it started to show signs of overloading (you will know it by the feel long before you reach it). Then set your power feed just a little slower. You should not have any trouble if you ease into it and pay attention to the feel and how it sounds.
Only fools abuse their tools.