Here are a couple of my forays into Ghetto reloading:
I have a few odd cartridges with a shaved plating lying around on occasion. Usually, they disappear into the unknown, never to be seen from again. One day I happened upon one and actually had the initiative to do something about it. So I pulled the bullet.
I had the scoop handy, and curiosity made me trickle the recovered powder into the scoop. Perfect amount. So rather than toss the brass in with my other fired cases, I briefly contemplated reassembling the cartridge. I could do it correctly: I.e. I could set up my press. Remove the decapping pin. Resize, flare, and seat a single bullet... or I could go Ghetto. I decided to try the latter.
I poured the powder back into the case and put a new bullet on top. Then I tapped the bullet in, using the round end of the kinetic puller like a hammer, until the bullet naturally stopped at the original seating depth. To my delight, this actually worked according to plan, and the bullet had plenty of neck tension.
I don't remember the exact caliber, but it was either a 9mm or a 40SW autopistol round. I don't think I would have tried that with a revolver round, for the obvious reasons. Nor a 45 ACP, because my Glock 21 is particular about the crimp.
Another occasion that called for Ghetto techniques was a batch of German made ammo with small flash holes. I turned down the end of a nail and hammered the primers out over a block of wood with a hole drilled through it. Then I reamed out the flash holes with the appropriate drill bit.