I ALMOST did it I have not purchased a brass mold, from Al and the guys. I don’t know why but I just keep getting aluminum. Properties of brass : does it hold heat better in small calibers or large calabers?
If I´m right brass holds heat better than aluminium. No matter bullet size. For bigger calibers if casted brass mold you should let mold cool awhile if casted large quanitys. Correct if i´m wrong… :-[
I prefer the aluminium moulds for their lightness, I have a few brass moulds and they do work well but are tiring to use compared to the aluminium.
I don’t know if it holds the heat better or not but I am quiet happy to believe that it does however this isn’t an issue for me as the aluminium moulds hold the heat more that enough for me, if anything I am looking to cool moulds down not heat them up even the RG ones.