Bullet

A bullet was a projectile propelled by a firearm. Most bullets were made from a type of metal.

In human mythology, bullets made of silver could be used to kill a werewolf. (DW: Tooth and Claw) Silver bullets were also utilised by the Brigadier to defeat the Destroyer. UNIT also used teflon anti-Dalek bullets and gold-tipped bullets for use against Cybermen. (DW: Battlefield)

In the Sontaran invasion of Earth in 2009, the Sontarans used a cordolaine signal excited the copper atoms in bullets and caused their expansion within a gun barrel, rendering Earth-made guns useless. UNIT managed a counter-measure by using rad-steel coated bullets. This made the cordolaine signal ineffective. (DW: The Sontaran Stratagem/The Poison Sky)

Bastic bullets were used to destroy Daleks, (DW: Revelation of the Daleks) but eventually Dalek force field technology advanced to the point where bastic bullets were no longer effective against them. (DW: The Parting of the Ways)