I posed that question in a recent thread and the bottom line is that cleaning off the lube is more trouble than it's worth. The best way to get rid of already lubed and sized bullets is to shoot them. If they've been working so far then they haven't suddenly become worthless, you'll just have to put up with the same amount of smoke for a while.
I'm in the same boat although with only a few hundred lubed bullets left on hand. I'll shoot them up and then as more new bullets are cast will begin switching to powder coating exclusively.
Still adjusting to the sight of green bullets sticking out of a brass case, it just looks wrong somehow...
