They are Lee 355-120-TC but I use the powder for any bullet. The powder is a batch of Sherwin-Williams powder coat powder that I got for free from a powder coat shop. He had a mountain of expired powders and other left overs and when I asked him about it and showed what I was doing, he gave it to me for nothing. Otherwise he would have charged $6 for the 3 pounds. It coats very well, but the pigment coverage isn't terribly uniform under all humidity.
These are decent
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But others are sometimes splotchy if I powder coat in wet conditions. It doesn't matter because the important thing is that I get 100% coverage with the polymer which protects the lead from gas cutting and seals the bore while also lubricating it.
Here's an example of terrible coverage of a PC job I did as an experiment right after a rainstorm
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But after going through the push through sizer, you can see the polymer flowed smoothly for 100% coverage of the drive bands.
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If you want good powder that will look nice check with
Smoke4320 at Castboolits. Your daughter might like Traffic Purple, although as of 3/5/2020 he's out of stock with that color. I've never used his powder but I've only heard great reviews of the quality of the powder he sells.