I shoot for a 4 year supply (pun intended...). I figure that way I can keep shooting at my normal pace for at least one year and then re-evaluate the situation with out worrying about running out. If after 2 years the market is still in panic mode it'll be time to cut back some. I don't have the funds or space to buy and store enough components for 100,000 rounds like some people but 10 to 20 bricks of primers and the corresponding lead and powder isn't too hard.