I don't really know to be honest. It maybe be the reason why we sometimes are catching fish on the lead core and not on the riggers, because maybe we are not down as far as we think we are with the leadcore but we set the riggers as if we were deeper. I just found it on the web and thought it might help. I guess you have to make your own mind up. I know I am not going to say thier wrong or right but I will tryit and see if it makes a difference, maybe it will maybe it won't I really don't know. if you try it let me please let me know how it works for you.