I want to know the answer to the following question:
What precision did the FBI believe they could reach with chemical signatures?
All the background I'm provided with is that "It found the analytic model used by the FBI for interpreting results was deeply flawed, and the conclusion, that bullet fragments could be matched to a box of ammunition, was so overstated that it was misleading under the rules of evidence.". Is that enough to answer the question?
Answer: no