Guns, ammo going quick: Local stores struggle to keep shelves stocked with ammunition as consumers stock up – Gun enthusiasts fearful of new weapon controls and alarmed by rumors of government hoarding are buying bullets practically by the bushel, making it hard for stores nationwide to keep shelves stocked and even putting a pinch on some local law enforcement departments.  At a 24-hour Walmart in suburban Albany, the ammunition cabinet was three-fourths empty this week; sales clerks said customers must arrive before 9 the morning after a delivery to get what they want. A few miles away, Dick’s Sporting Goods puts up a red rope after ammunition deliveries so buyers can line up early to get a number, averting races up the escalator to the gun counter. Both stores are limiting ammunition purchases to three boxes a day.