I was casting some 8mm boolits with my single cavity Lee C324-175-R mold with HardBall alloy. Have cast with this mold before with straight Linotype. I have always run my temps very hot and kept my mold very hot. Read some past post about running alloy temps around 600 to 700. I decided to run my temps around 725 instead of my usual 880 to 900. Heated my mold over my gas stove. I always heat until I can't touch it quickly without burning my hand. The mold was hot. I poured a boolit and it came out completly frosted with excellent fill out. I poured another and it dropped with a little frosting but good fillout. I dropped another and it was shiny but good fillout. The next one I dropped had some wrinkles around the nose. The next one I drooped had many more wrinkles. Mold was to cold. Reheated my mold and tried again. Same results. Now I know it was a little cool around here that night. Don't laugh but 70 degree weather in SouthEast Louisiana is cool. But I decided to crank up the temps on my alloy. Went up to 850 and had no more problems. I am a firm believer that you have to run your Lee molds and alloy temps very hot. This is the first time I tried with a lower alloy temp and it seemed it would not keep the mold hot enough. Even with a single cavity. Run my temps around 880 to 900 with double cavities and have never had this problem.