My Lee production mk4 arrived earlier this week and it's great! It gets to temperature and melts really fast, it has a new design of tap which (so far) hasn't dripped and is allround a great thing.

I have scavenged lead from the range and now have over 9kg of pure-ish ingots, basically stirred and scraped until nothing else came to the surface. I made and used lots of 12g slugs from this stock, but now I have a mould for .357. Do I just use this grade lead or does it need treating with wax first?

I did flux a batch but I didn't really see a difference, am I doing it wrong?

Last question, one ingot fell in half when I lifted it, was this just because it was too hot? Once it was cool it marks with a nail etc.

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