I have searched and cant come up with what temperature frosted bullets occur. I do know that mold heat has something to do with bullet frosting as well as what type of alloys are being cast
I just received a Roto Metals lead thermometer and at 780F using 20 to 1 lead tin alloy in my Master Pot with 34 pounds of lead I could not cast frosted bullets in my iron 4 cavity Lyman or aluminum 6 cavity moulds. I have casted them in my 20 pound Lee bottom pour pot with the temp up at 7 and the pot low on lead but have no idea what temp I was at I did create a lot of the oxidized "dirt" in the pot at that temp and the pot was glowing red at the bottom . I am having issues with my cast bullets coming out shiny and some wrinkling . I'm working on that issue and it may be because my mold shelve is too far from the spout I have recently had success with my Lyman mould that are taller
Additional I heated a 2 cavity Lee 200 grain .45 acp SWC mould in the lead one minute at probably 700F and immediately began casting some excellent bullets from the Master Pot but did not have the thermometer at that time
I'm starting this thread to get any opinions on frosted bullets as when they begin to frost I have had some excellent filling out of my moulds and then backing down a bit to unfrosted making good bullets with fill out and no wrinkling with the Lee pot. So let us all know what temp bullets frost with what alloys or any other knowledge you casters may have on the subject