Ever hear of reloads? Reloads may or may not have serial numbers. If casings are tagged, and my spent brass was used in a reload that was used in a felony, I am in trouble.
The serial number will be on the base of the bullet itself, not the brass.
My question is, what about ammo re-sales? Stolen ammo?
Bottom line, is this is the CA legislature's way to get rid of all guns in CA. In a way, I hope they do it, because when we see gun crime ESCALATE in CA after firearms are effectively banned, it'll provide our side with yet more data.
Reloads would be illegal under this legislation, as would be possession of unmarked ammo.