harvyedavies
New member
Hello all, could I pick the collected wisdom of you all please? I am currently using a set of second hand 28" 620 spined ACE arrows with inserts at 49g and points of 41g. I've been increasing my poundage and am now drawing 41 lbs on my fingers. I have recently tried tuning my bow and have found the arrows are very weak, I can bring them back in to tune by dropping the draw weight to 38lbs. I have borrowed a set of 570 spined ACE of the same spec as my 620s and these tune perfectly at 40 lbs. I am increasing my draw weight to 43/44lbs and will need to replace my 620's - my question is from peoples experience how the spine relates to increased poundage - from my practical experience it looks as though a spine of say 620 will be good for a 3 to 4 pound range which would mean I would be looking at 520 spined arrows rather than the 570s. I know I could also use other methods of weakening or stiffening the arrows with inserts and point weights but I'm trying to find the best baseline arrow spine and then do the fine tuning with draw weight changes kept to a minimum.