Chaz, I'm too new to casting to be much help. I'm using a Dutch oven and a Coleman stove. The one thing that helped me the most was a thermometer. Different temps, different molds, everything started to "click" when I found the temps at which different things occurd ie, wrinkeled bullets, frosted bullets, finning, moulds too hot, moulds to cold, ect. When I found how to control these things with temp and casting speed, it all got a lot easier.
Not even two cents worth