ORIGINAL: Bowshopper
The OG at 70lbs 350 grain arrow, 27.5 draw it shows IBO of roughly 280. The little notation at the bottom states, SPEEDS ARE AT 70lbs. , SUBTRACT 3 fps FOR EVERY 10 LB>DROP IN DRAW WEIGHT. My question is At 50lbs. are they also dropping the arrow weight to IBO or are they still using a 350 grain arrow?
The bows are tested at 5 grains per pound regardless of draw weight so they use a 250 grain arrow for 50 lbs. etc., etc.