Sakoluvr: Take some friendly advice and forget WHY the ammo is hard to find and accept the fact that it is - then just buy enough (or have on hand enough!) 22 ammunition to protect yourself and your family for the rest of your life.
Better safe than sorry.
And I would not describe folks who are buying up and storing up
22 ammo as being crazy - far from it!
Hold into the wind
VarmintGuy