It's a judgement call. It's pretty unlikely you'll find yourself still in a gunfight & having to reload empty magazines. For me it's a price thing, if I find it on sale I buy it, then put it in a airtight ammo can & don't open it. It'll be good for a long time. But ammunition is like everything else, the prices only go up. And in a few years you'll be kicking yourself for not buying more when it was half as expensive.