The mold for the hex slug says it is a paper patch But I think Buff arms is incorrect. the other mold I ordered from Accurate arrived yesterday. It is a conical and drops from the mold at .452 and weighs 505gr.I cast some out of pure lead and they will be the first tried. I see lots of experimentation. If I have to paper patch there is going to be a learning curve. Tried it once before and wasn't very successful.