NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The Bullet Black Box Working Group (BulletBB-WG) was convened to review the results of the NIST-Noblis Bullet Black Box Study, and assess the implications of that study on casework. This report includes the recommendations of the BulletBB-WG on how to address those implications with the goal of improving the practice of the comparison of bullets by forensic firearms examiners. BulletBB-WG's recommendations focus on standard operating procedures in casework, quality assurance, training, proficiency and competency testing, standardization, testimony, admissibility, and use/communication of the Bullet Black Box Study results.
Working Group, B.
(2025),
Implications of the Bullet Black Box Study, Grant/Contract Reports (NISTGCR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.GCR.25-068, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=960209
(Accessed October 14, 2025)