I suppose there's no way to dispute this claim. I also suppose that in the past.....this has been the case MUCH moreso than it is, now.

Bowtech, for one, is telling its dealers, now, that their new bows have little problems operating at lower poundages (according to my shop owner). So....according to them....a 60-70 lb. bow should perform well at any poundage within its range.

Admittedly.....(and the reason I stated it's tough to dispute this)....a 70lb bow will be faster at its peak weight. Hard to argue that. But it can also perform WELL at lower poundages.

I shot my '07 Ally at 71#'s.....until I realized it liked 66#'s, more. Hence where I shoot it, now. It may be faster at 71#'s.....but it's more accurate at 66#'s. At least it is in my hands.