Smoke4320
09-26-2013, 02:10 PM
have you ever seen a mold at will only cast properly when completely cold ?
I have a RCBS Mold that will only throw good bullets if the mold is cold.. after about 5 to 7 casts it will have a heat induced shrunken and frosted area ..
same area every time and on both cavities..
I have tried lead temps from 650 to 725 degrees and the hotter the lead the faster the shrunken area shows up ..
tried preheating the mold and got them within 2 casts ..
lead is 98% coww and 2 % Hi speed billet (for the tin and little copper)
ideas?
I have a RCBS Mold that will only throw good bullets if the mold is cold.. after about 5 to 7 casts it will have a heat induced shrunken and frosted area ..
same area every time and on both cavities..
I have tried lead temps from 650 to 725 degrees and the hotter the lead the faster the shrunken area shows up ..
tried preheating the mold and got them within 2 casts ..
lead is 98% coww and 2 % Hi speed billet (for the tin and little copper)
ideas?