Hi there,
New to castboolits, great group of people for sure!
I recently melted down some WW, Being careful not to melt down the zinc. I'm filling some lyman 4lb molds and have some quesins.
Is it normal when filling the entire mold (not just the cavities) to have some shrinkage? I'm also getting rough almost lumpy texture as well. All of the poured ingots are BHN 11-12 (pencil method) so I do not suspect zinc contamination. Any thoughts? I do not preheat my ingot mold, could this be causing the shrinking and rough texture?