Actually, the Speer Gold Dot bullets are plated. Give them a call and get it from the horse's mouth. The Gold Dot bullet is much more heavily plated than those from Berry, Rainier, ect so they will tolerate high velocities. You are correct, many of the other brand plated bullets do use lead bullet data because the plating is much thinner and the velocity has to be held down a bit. Some plated bullets will still lead if pushed hard enough. However, I have never found this to be the case with the Speer bullets in the applications that apply to me.