Something that hasn't been mentioned:
FMJ bullets are made by putting lead into a "cup" of jacketing material
and forming, leaving the lead exposed at the base.
Hollowpoints are formed in much the same way, but the base is covered
and the exposed lead is at the tip.
If you make a hollowpoint out of a FMJ, you end up with a tube of
jacketing material surrounding a core with lead exposed at both
The tube (jacket) can stick in the bore, blowing the core out the muzzle.
Next shot with the jacketing tube stuck in the bore? That's how
people get nicknames like stubby.