“If the market runs out of .22 cal ammo and my neighbor has 500k rounds, can the authorities raid his home?”
If someone has half a million rounds of any caliber ammo they are liable to get raided by the cops as is.
Based on what law, or doesn’t that matter to government toads like you?
What if my ‘neighbor’ had half a million dollars in a safe - would you advocate raiding that too?