Bullet design question

[djc]

I'm new to the whole bullet casting thing, so excuse a stupid question.
I would like a hollowpoint bullet in the 208-220 grain range that would expand at subsonic speeds.
I work in a machineshop and have access to the equipment, so I thought about making my own mold.
My question is, if I plan to powder coat these bullets, do I need to put lube grooves in the tool?

[boost]

I'd say no, but i would...

If you send a mold my way , I'll be more than happy to help in the research and development.

[Ken73]

Great question, and it's come up a few times before - the concession is an astounding "no" as the powder coat tends to act like a jacketed bullet.

Consider this: there are actually many designs out on the market that have no lube grooves - they are for "paper patched" rounds. If a thin piece of paper is sufficient in preventing leading, I'd think a polymer jacket is probably superior in strength to that flimsy piece of paper.