As for FFL sales you are correct big brother knows what you have bought of course he does not know what you have sold, traded or given away. I don't keep up with gun laws every where but in FL private face to face sales do not require any paperwork. Some people will do a bill of sale and get a drivers license number of the buyer or something like that but many don't do any paperwork.
I got my first gun at age 8 it was a 410 shotgun that I'm sure my father did the paperwork for since we owned a business that sold guns and held an FFL for many years. I have no idea how many guns I got before I turned 18 that my father was the legal owner of for FFL purposes. I also have no idea how many guns I have bought, traded, or sold, or given away since from the time I was 8 until now into my 60's. As an adult I gave my dad guns he gave me guns some I got when he died and others I have no clue what he did with them I did give other family members some of his after his death. I have also given multiple guns to my daughter and son in law, brother in law, and some cousins.
My point is that big brother may know what guns I bought from an FFL dealer but doesn't know whether I still have them or not nor would they know if I bought a gun in a private sale. I know I don't own every gun that I've bought through an FFL and honestly have no idea how many guns I've bought, traded, sold, or given away and if I don't know there's no way they know.
Chile is right on the ammo buy what you can when you can because you just never know what's going to happen when. Stored properly it will be fine and ready to use when you need it. A friend who was a neighbor really got me into shooting handguns and for several years we shot 3-4 times a week and shot anywhere from 100-500 rounds each every time so we went through a lot of ammo. Him and I both reloaded and shot a lot of the same calibers so when we went to reload we would usually do 8000-10000 rounds per caliber then split it. He would reload one caliber while I reloaded a different one it worked out well. We actually got into melting lead and casting our own bullets the reloading got to be another hobby but when you shoot that much you about have to reload to be able to afford it and that was before ammo shortages and all that.
This thread has been fun so far lets not get politics brought into it so that it has to be deleted.