This particular bit of lawyering has been now discredited and can no longer be used as evidents.
another one of those things the FBI lab used for a length of time but now it's gone. They could show a strong similarity but unfortunately is was just as similar to any other bullet in that lot of 10,000 or more. metallurgy in todays bullets is held to the closest tolerances possible. should you cast your own bullets this would work but commercial bullets it's not workable.
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I have heard of part. box of bullets found in a guys house matched the bullet metallurgy of a bullet a person was killed with and was just one more nail in the coffin for a conviction.
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