Interesting read on DC laws

http://www.cnn.com/2009/CRIME/02/10/obama.threat/index.html

DC you must be registered to have ammunition or the ammunition must be registered to you.

DC Code § 7-2506.01. Persons permitted to possess ammunition

No person shall possess ammunition in the District of Columbia unless:

(1) He is a licensed dealer pursuant to subchapter IV of this unit;

(2) He is an officer, agent, or employee of the District of Columbia or the United States of America, on duty and acting within the scope of his duties when possessing such ammunition;

(3) He is the holder of the valid registration certificate for a firearm of the same gauge or caliber as the ammunition he possesses; except, that no such person shall possess restricted pistol bullets; or

(4) He holds an ammunition collector’s certificate on September 24, 1976.