I cast some bullets yesterday here in WV. We are in a cold snap. The temperature in the garage was about 40 degrees. I had trouble getting good bullets. I had to crank up the lead temperature from 715 to 750. My summer temp is around 715. I also opened up the adjustment on the pot so that the lead was getting into the mold quicker and had to cast as fast as I could to keep the mold hot enough. I never got any frosted bullets as I would if I done the same thing when the ambient temps are 75- 80.
Do any of you experience the same thing. How much variation do you see in summer to winter lead temperature?