Don't worry I got scoffed at a month ago asking the same question. If nothing else major happens you'll be looking at being able to do that in about a year..... On that note, find a shop that regularly carries ammo, most of them are going to be shops with ranges attached. Go there as often as you can and pick up the maximum they will allow you to buy. I've collected around 700 rounds of 9mm in the last couple of weeks by stopping by vandailia range and armory old, old English, and Walmart. I've yet to pay more than $15 a box. I'm pretty proud of that, as much as that hurts me to say.