California Code, Penal Code - PEN § 30325

Nothing in this article shall apply to or affect the possession of handgun ammunition designed primarily to penetrate metal or armor by a person who found the ammunition, if that person is not prohibited from possessing firearms or ammunition pursuant to subdivision (a) of Section 30305, Chapter 2 (commencing with Section 29800) or Chapter 3 (commencing with Section 29900) of Division 9 of this title, or Section 8100 or 8103 of the Welfare and Institutions Code, and the person is transporting the ammunition to a law enforcement agency for disposition according to law.