I was powder coating cast boolits for 45 ACP by using black airsoft BB's and when I opened the lid I found BB's had stuck inside the hollow points. I had to use two sets of needle nosed pliers to get them out and leave the powder relatively intact. I use an NOE 453-220-RF RG2 PB Mold using the large hollow point pins to cast the bullets. I'm going to change the mold to the shallow hollow point pins. I don't think the Airsoft BB's will stick inside the shallow hole.
I don't know if anyone has mentioned this before. FWIW, it may be interesting for those with large hollow point molds.