If someone could indulge me,could you tell me what type of Lead,is pictured on the PR Bullet Web Site.The picture where it is stacked on the Flatbed Trailor.Ide like to try my hand at Molding my own,but i really dont know about different kind's of Lead,Pure,Lyno ,Ect.I have access to the exact Bars on their web page,and just looking for a educated guess as to it's composition.