Walt it's no secret why there's an ammunition shortage. It started back in the mid-2000's, when the military's demand for ammo started straining production. Not so much for the two wars, but for training the troops going into those wars. For example, I used to be able buy Israeli-made IMI brass, but you can't get it anymore. All of IMI's production is bought up by the US and Israeli military. (The US only uses it for training, since it would be politically unwise for Israeli brass to show up where US troops are fighting muslim insurgents.)
Next the price of brass went out of sight, which drove up ammo prices and made spent brass hard to come by.
Then of course, we had a little panic back in 2008 when everybody started buying everything in sight. Ammo stocks were just starting to recover from that when the Newtown massacre occurred, leading to the current big run on guns and ammo. No conspiracy, just supply and demand, with demand fueled by paranoia.