The gun nuts are stocking up. Three and a half years worth of ammo sold in three days.
So, the gun nuts feel threatened, afraid that the Gummint will outlaw their high-capacity magazines or cop-killer bullets. So they stock up. If some sane gun-control laws actually do get passed, there are still going to be millions of bullets out there, and millions of crazy Americans with guns. Even if gun control comes to pass tomorrow, which it won't, or next year, which it won't, or the year after that, which it might—we have years and years of massacres to look forward to.
The key for the sane American out there: keep the heat on the NRA and their allies. Every gun death should be made as prominent as Newton.