I don't know where this is coming from, but why would you put Lubed boolits in the oven at any degrees. It defeats the purpose of lubing them. If you are having a problem with severe leading, and your are heating them in the oven after lubing. I will guarantee you that is the problem. No one can convince my that heating lubed boolits in an oven is a good idea.
The heading should have read, lubed