Ironglow: yes, the unsafe act will require a background check for ammo purchases whenever the nysp get their program up and running but until then you can continue to purchase what you want, at any quantity that is available for you without the background check.
There are a number of strategies around as to how to deal with the background check for ammo. Apparently nobody cares much if you purchase large amounts of 22lr ammo as the powers that be do not consider it dangerous stuff as they would seem to be looking out for large purchasses of M16/Ak47 type ammo. So, when you make your first purchasee under the law, whenever that comes to be, save your pennies and purchase large amounts - your background check wil clear you for purchase and the next time yourname comes up for a check they will see that you always buy a lot of ammo and that you have been cleared before, so you are good to go.
As for the M16/223 ammo - make certain you have a bolt, pump or legal AR type and you will be fine - same with the AK47 ammo - if you have a bolt rifle you are in great shape and I doubt anyone will even bother to question you after your first large purchase.
And don't forget, the unsafe act does not apply across the borders and any ammo you purchase out of state will nto require a background check.
Now, if our Native Americans would really like to kick kwomo in the butt for twisting their arms to kick over more casino winings or get a state run casion across the thruway from them, they should consider opening up gun stores to sell ARs. AKs, and all the ammo they can import across their native borders from Canada. You know, if our Native Americans here turned away from kwomo since they have found out he really does not support the oppressed and downtrodden, they could put a serious dent in his campaigning up here and of course, if they opened up gun shops that operated under Native law or Tribal law or Federal law, it would be a huuge thorn in his side and a direct insult to his strong arm efforts. Someone oughta go talk to those people................................