It seems to me that as I start casting with a mold, first the bullets have wrinkles, and so are rejects. Then as the mold warms I get perfectly formed shinny really beautiful bullets. Then, if I let the mold get warmer, (and it is hard to keep it from doing so) the sharp edges on the bands frost and when they frost they also round off, and are no longer sharp. Then if I continue to get warmer, the whole bullet frosts and everything gets sharp again.
So what is the frosting of the bands, which rounds them off? Why does the mold go from giving my well filled out bullets to rounded ones with an increase in temp? I thought hotter was supposed to mean better filled out.
Is this observation consistent with what all you experienced guys know, or am I observing it wrong? I tell you this thing of getting nice bullets and then getting hotter and getting rejects again, before getting frosted bullets had me confused. Maybe it still does. Any comments are appreciated.
It is easier to just get everything real hot and frosted and I seem to get less rejects that way I think, but the shinny ones sure are pretty, and on a cold day outside, it seems like sometimes I can't get my iron molds hot enough to frost the bullets.