Well - I did an experiment yesterday with my Atletic - 25 years old French bow. Because it feels very hard to draw. I measured in a manuel way with an draw length arrow indicator from Easton and with a draw weight puller, from 22" to 28" draw. In the range 23"-24,5" it gains 1# per 1", in the range 24,5" - 27" it gains 1,9# per 1", and in the range 27" to 28" it gains 3,0# per 1".
I also while looking in the mirror saw that at my draw length (25,75"), the tip of the limbs are not vertical but have an angle against me. So at this point the bow is beginning to be drawn shorter - wich could explain the jump from 1,9# to 3,0# per 1", that occurs at 27" draw.
This makes me think that my bow is best for one with a short draw length of about 24".