I am almost embarrassed to admit that I was caught a bit short in a couple rifle calibers.
Because I assumed that the common hunting calibers would remain available, because I figured I had enough to get through hunting season and just wouldn't be shooting a lot of rifle (I admit, almost all of my shooting sessions these days are my duty pistol, carry guns and ARs), I didn't pay any attention. I had stockpiled a ridiculous amount of 9mm, .45 ACP and .223/5/56 prior to the 2016 election, but when I was getting ready for hunting season, it was like, "Hey, where's all the .30-06?"
Even .30-30 started drying up. I still see plenty of .25-06, .243, 7mm Mag, 300 Mag stuff out there, but who'da thunk that all the 6.5 CM and .270 would be bought up by all the hoarders? (Not me, apparently)
I confess to picking up the odd couple of boxes of whatever caliber (that I own guns in) might be on the shelves of my local stores when I wander through... Now, I won't pay stupid prices (I have one local rural chain store that charges pre-panic prices and has a two-box limit per caliber), but, yeah, I'll buy some.
"Infectious?" At this point, I don't feel as though I'm contributing to the madness (and the shortages), it just seems prudent.
(And a couple buddies say, "That's why we reload." I say, "I don't care, I have too many other hobbies already, my time is worth more than I can save reloading, and I don't wanna have to be tied up indoors doing something I frankly find tedious." I sorta get tired of the self-righteous trumpeting of the reloading crowd, as though they stand above those who have routinely bought commercial ammunition... well, okay, maybe they can crow a bit, at least in regards for those willing to pay the stupid prices.)