Just speaking for myself I have seen no difference in accuracy between the several rifles I built using the stock or aftermarket recoil lug. I have two that shoot lights out using the stock recoil lug. However, I will also say I have seen magnum calibers bend a stock recoil lug. So if I was building a magnum or a competition rifle I would go with an aftermarket lug just to be on the safe side. Otherwise I would not worry about it. That's my two cents.