I've run across a few places on the internet (I know... I know...) that say lubing isn't strictly necessary for lead bullets.
The reasoning is that, if the bullet is undersized, there will be leading regardless, and if the bullet is sized correctly, leading will not occur.
Cited on one page is "Norm Johnson," who "is shooting un-lubricated revolver bullets, with good accuracy and no leading."
Given that lead is used as a lubricant in some non-shooting applications, this does sort of make sense.
What do you all make of this?