I’ve heard this time and time again over the years. Don’t remove a bullet using metal forceps or a hemostat. Don’t drop it into a metal pan. Have you heard these, too? Is it true?
The idea is that rifling marks on the bullet that would help match it to a particular weapon may be damaged through mishandling, interfering with any criminal investigation.
So I decided to go to a reputable source. I asked a local police firearms and munitions expert the question. The result:
Myth busted! The amount of damage to the bullet due to handling with metal instruments is negligible and will not interfere with an investigation. Many of the bullets used in crimes are jacketed with copper or other metals, which are resistant to damage anyway. The surgeon would have to make an intentional effort to damage the bullet enough to interfere with a ballistics investigation. And I don’t recommend that anyway!
Source: The Trauma Professionals’s Blog