I've been casting and "running ball" for over 30 years and I think your video guy has too much time on his hands. I saw too many errors he made in the short video, so I wonder why he is going through all that trouble. 1) I don't see any ventilation inside his room. 2) Two casting pots make some sense if he were casting 6 bullets at a time, but he is only using a 2 bullet mold. So what is the rush? 3) He was hitting the mold to loosen the bullets out. When hitting Lee aluminum blocks and not the handles, he will permanently distort the mold. 4) He put his excess lead in the wrong lead furnace and that will significantly lower his casting temperature that he has so diligently maintained with two lead furnaces. 5) A "frostly" appearance of lead is an indicator that his lead is too hot. He could compensate by adding more alloy to the mix. 6) He should allow a little more hot lead on top of the sprue hole before allowing the lead to cool. Lead will suck up more into the mold as it cools. If there isn't enough to suck up voids can occur in his bullets which will throw off their accuracy.