As a growing number of gun shoppers are discovering these days, it's becoming easier to buy a gun than it is to purchase the ammunition for it. Shortages of popular handgun calibers in particular have dealers and customers fuming, and ammo makers have shifted their production lines into overdrive to keep up with the demand. How long will the "bullet bubble" last? That depends in large part on politics in Washington and in statehouses across the land, and the messages that various legislative efforts convey.

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