My wife shoots the Pse spyder with the rim fire cam it has amazing draw length adjustments my wife has about a 25 -26 inch draw length and the limbs are from 40-50 pounds. Well I hurt my shoulder and cant pull back my 70 pound bow. so I changed modules and moved the draw stop, now Iam shooting her bow at 50 pounds and a 29 inch draw length so I think your son can definetely grow into this bow and it is very quite and has a smooth cam and its around 75 percent let off. If I ever get my wife or my son another bow it will definetely be a PSE Spyder. hope this helps, Bootarcher