The post-Newtown Great Ammunition and Firearms Sales Surge has stretched the country’s supply chain to breaking point. Actually, it’s broken. Shelves are bare. We’re hearing reports that shooters are conserving ammunition supplies by . . . not shooting. Or shooting guns for which they have more plentiful ammo (e.g., .22 caliber rifles and handguns). Is that true for you? One helpful hint: switch to 5.45 X 39. In stock! Another: shoot more slowly. A third: wait. This is America. If there’s money to be made, someone will make it. Ammo’s coming. Eventually.