I like frosty well filled out bullets too. What I don't like is the smearing that occurs on top of the mould and underside of the sprue plate when casting high antimony alloys at obscene heat with iron moulds. The alloys and heat aren't open to change, but is there something I can do to alleviate said smearing? I wait a full ten-count after the sprue frosts over before opening the mold. I've put up with it for many years, and have grown adept with a single edge razor blade for removing it but I know there has to be a better answer.