When creating ammo with the reloading tool, save enough gunpowder to mix up
the same type of ammo eight times. On the eighth time, the game will prompt
"Do you want to create the enhanced ammo?". Select "Yes". This ammo is more
powerful, may have slightly different effects, and once loaded into a weapon
will change it into an "enhanced weapon". Once you have loaded a weapon with
enhanced ammo, do not reload it with regular ammo. You can only create two
types of enhanced ammo: 9mm handgun bullets and shot gun shells. Also, do
not combine enhanced ammo with regular ammo.