Typical feel good gun control law in my home state of NJ.
2C:58-3.3 "Handgun ammunition" defined; sale, purchase, etc., regulated; violation, fourth degree crime.
1. a. As used in this act, "handgun ammunition" means ammunition specifically designed to be used only in a handgun. "Handgun ammunition" shall not include blank ammunition, air gun pellets, flare gun ammunition, nail gun ammunition, paint ball ammunition, or any non-fixed ammunition.
b.No person shall sell, give, transfer, assign or otherwise dispose of, or receive, purchase, or otherwise acquire handgun ammunition unless the purchaser, assignee, donee, receiver or holder is licensed as a manufacturer, wholesaler, or dealer under this chapter or is the holder of and possesses a valid firearms purchaser identification card, a valid copy of a permit to purchase a handgun, or a valid permit to carry a handgun and first exhibits such card or permit to the seller, donor, transferor or assignor.
c.No person shall sell, give, transfer, assign or otherwise dispose of handgun ammunition to a person who is under 21 years of age.
d.The provisions of this section shall not apply to a collector of firearms or ammunition as curios or relics who purchases, receives, acquires, possesses, or transfers handgun ammunition which is recognized as being historical in nature or of historical significance.
e.A person who violates this section shall be guilty of a crime of the fourth degree, except that nothing contained herein shall be construed to prohibit the sale, transfer, assignment or disposition of handgun ammunition to or the purchase, receipt or acceptance of ammunition by a law enforcement agency or law enforcement official for law enforcement purposes.
f.Nothing in this section shall be construed to prohibit the transfer of ammunition for use in a lawfully transferred firearm in accordance with the provisions of section 1 of P.L.1992, c.74 (C.2C:58-3.1), section 1 of P.L.1997, c.375 (C.2C:58-3.2) or section 14 of P.L.1979, c.179 (C.2C:58-6.1).
g.Nothing in this section shall be construed to prohibit the sale of a de minimis amount of handgun ammunition at a firearms range operated by a licensed dealer; a law enforcement agency; a legally recognized military organization; or a rifle or pistol club which has filed a copy of its charter with the superintendent for immediate use at that range.
You now have to show your FID to purchase ammunition in New Jersey, does not affect possession.
A lot of folks also confuse USE with POSSESSION. these are 2 very different legal terms
In addition
The law does not prohibit bringing in ammunition from another state
The law does not prohibit purchasing ammunition on line
The law does not prohibit or restrict the purchase, sale, ownership or use of reloading equipment or components.
So all it does is mean is that fewer folks will make an impulse buy at the store of ammo and will spend the money out of state and therefore reduce the tax revenues of NJ.