John Silveira has the story:
http://www.backwoodshome.com/articles2/silveira116lw.html
"It's been proposed in 18 states and, with some minor difference among them, here's what it will do once enacted:
* Each box of ammo you buy will have a unique number.
* Each round in the box will have a laser-etched number on the base of the bullet and on the inside of the cartridge case that corresponds to the number on the box.
* Each time you buy ammo you will have to show ID with your name, date of birth, driver's license, etc., to be recorded so the box will be tied to you.