Regardless, all that considered, and the fact that the ammo order was for multiple years, not just one, 750,000,000 rounds really doesn't sound that far fetched.
Here's my problem. We have a group of people who see ONE contract for an ammo purchase, and immediately make all sorts of extraordinary claims (Gov't is trying to increase ammo prices, Gov't is stockpiling for inevitable civil unrest). These same people will say things like, "Well, what else could that ammo be for?" as if the burden of proof is on the doubters (who never made an extraordinary claim). Then, you give them reasonable answers, and they try as hard as they can to prove them wrong. This is how conspiracy theories end up working. There is no solid proof (or even anything resembling good evidence) to back up the claim being made. Yet, because this particular piece of VERY circumstantial evidence fits the presupposition of the person making the claim, there simply cannot be another reason for it.
Extraordinary claims require extraordinary evidence. All we have is a single contract that has an unusually high amount of a particular product being ordered. If you want me, or anyone else to believe there's more to this, more evidence is needed. Now, I'm not saying that these things aren't possible, but that there are simpler, much easier to believe reasons for the ammo purchase.
Now, having said that, I do think an investigation into why that much ammo is being purchased is probably a good thing. Not because I think there's anything malicious going on, but because we're furloughing Federal workers, cancelling White House tours, and putting restrictions on the use of National Parks due to the furlough, yet, we're buying (an estimate) a quarter of a billion dollars worth of ammo for the next several years. It's more of an accountability thing than anything else.
Again, if you can give me evidence of a potential conspiracy, threat, malicious intent, etc, we'll talk. But until then, this contract is not proof of anything.
The massive spending has been taking place at around the first of the year or possibly earlier if it goes by fiscal years. Sandy Hook happened just before the end of the Calendar year.
Coincidence?
Oh, oh, oh, and an earthquake happened in Turkey in the 90's at the same time the Space Shuttle was flying over! Oh, and that one time HAARP was turned on, and birds in China started falling from the sky, and then Hurricane Katrina happened!
Coincidence?
And to answer your "coincidence?" question:
Yes, most likely. Things that appear to be too strange to be coincidental, usually end up just being a huge coincidence, nothing more than that. Here, check this out, it's an image of a newspaper clipping:
http://i.crackedcdn.com/phpimages/article/8/8/6/32886.jpg?v=1
Reading that, the driver and the passenger must have had something out for these brothers, and made sure they killed both of them in the same way! Or...it's just an amazing coincidence.
Oh, and the Government's Fiscal year starts in October. So FY13 goes from October 2012 to September 2013. So, unless you're implying that Sandy Hook is "an inside job" or I'm misunderstanding what you're writing, the massive spending started a few months prior to Sandy Hook (which, of course, is the catalyst for our current ammo buying panic).