Jovian Thunderbolt’s take on the subject:

1800 rounds isn’t even gun-nut categories yet. I gotta work harder at this.

If the world as I knew it, does end, I’m going to wish I had 18,000 rounds or more.

Ooo, definitions. That last scenarios has an abbreviations, for those unfamiliar with survivalist nomenclature. The End of the World as I Know It = TEOTWAIKI. That’s when the Asteroid hits and the gov’t falls, or the Zombie outbreak is out of control, or a plague kills 50% of the population.

More here.

From Armed Canadian:

All I have to say is: “Stock up, you’re low.”.

Much to the chagrin of my girlfriend, I do operate in the “Gun Nut” plane when it comes to ammo.

The rule of thumb is 200 rounds per caliber you shoot. I break that rule and the whole hand it is attached to.

1000 rounds per caliber is more to my liking. It really depends on what you shoot. This is where owning a mixture of firearms helps. Milsurps are nice because their ammo tends to be cheap when it is readily available. When it is, stock up! Ammo keeps nicely. Decades or more if in a sealed can.

More here