I am not knew to casting, 30 year veteran at it. I am having about a 55% rejection rate, due to not filling out the base of the bullet. The mold is hot, am putting in an extra amount of lead pooling up on the sprue, no rhyme or reason. The alloy I am using is half wheelweights/half pure lead. Never had this kind of problem when casting pistol slugs that were HP's! All replies welcome!