My Lyman manual has number of cast load data using Blue Dot. Yet, online there is a warning NOT to use Blue Dot for .357-125gr loads because the cone will crack. Does this warning pertain to 125gr jacketed bullets and not cast bullets and also not cast bullets with a gas check? I plan to cast 38-125gr HP bullets from MP Molds and expect 3% Antinomy or pure lead with 2% tin. As a result, I expect the alloy to be heavier than 125gr. Atleast this is my experience. My question is, can I use Blue Dot?