Can I ask, what is the purpose for powder coating boolits?
I'm guessing that it reduces leading? o need for lube? You bake them, right? I saw some pictures of powder coated (PC) boolits, they were cool looking, I'll give them that! Florescent yellow and green? Pretty cool.
However, if PC reduces leading, then I went a different direction to eliminate leading. My Dad taught me to cast at about 8 or 9 years old and I've been doing it ever since so I had many encounters with leaded up guns. I was talking to an older gun buddy of mine who also casts and he told me, oversize the boolits to eliminate leading so I loaded some in 44 mag that were unsized and only lubed. No leading. Wow, leading doesn't have anything to do with velocity! sent my sizing die off and had it opened up a couple thousandths and now I havent seen leading in years! FYI.... if your mould throws them big!