Really the question is as much about filling philosophical needs as hard and fast needs. I don't stockpile very much at all. I shoot in my backyard and generally only load what I'm shooting at the moment. Occasionally, a neighbor and I will get together to shoot, and more often than not, I will have to load some blammo before we shoot. This page, http://www.awrm.org/ has some useful guidelines, but they are a bit beyond what I think my needs are, and in that may well be the crux of the question, how does one give an honest evaluation to determine what their needs are. Perhaps I just answered my own question; decide what you would like to have on hand, (use whatever criteria you like for that (war, civil unrest, zombies) any ideas for what that criteria should be?) add to it what you'd like to be able to grab up and take to the range, and then add some figure to account for ones laziness to replenish that drain on the stash 'cause you don't feel like loading today... Thoughts?