Thanks mehavey, I had played with the PID earlier this evening, started casting at 700* and worked up to 775* before I got rid of the wrinkles, this was with a well heated mold.
I never got frosty balls so I figured that I could go a bit hotter, but was curious about what other more experienced casters had found to be an appropriate temp range for casting pure lead balls of that size with an aluminum mold.
Thanks again for your help,
Rich