I'm a very frugal guy... so much that friends and family poke fun at me constantly. (I don't mind)
But I'm not so frugal that I re-use lead bullets. They are very cheap, and if I make a lousy round with one because I used a crappy bullet, then I've wasted a primer, a small charge of powder and all the effort that went in to building the round. Furthermore -- I put an ugly looking hole in the wrong part of the target because the bullet landed wherever it wanted to.
If that weren't enough, I don't know when I prepare to pull the trigger the next time if the next bullet is going to be a crappy one, too which messes with my confidence. I'd rather know before I pulled the trigger that my best effort went in to the load I'm about to discharge, so I have no excuses about my ammo. If the shot sucks, it's going to be about my shooting, not about my technique at the bench.
I keep lead in a recycle box, but I don't ever seat a used or pulled bullet.
Doesn't mean you can't... just that I won't.