DHS Stockpiling Civilian Application Muntions with Plans To Destroy Military Munitions?

So....in the midst of the Department of Homeland Security, buying millions of rounds of handgun and shotgun ammunition? For close to a billion dollars? Why is our government prepared to destroy over a million dollars in military grade ammunition? 

I know what my belief and suspicions are......what about yours? 

Report: Pentagon to destroy $1B in ammunition

WASHINGTON — The Pentagon plans to destroy more than $1 billion worth of ammunition although some of those bullets and missiles could still be used by troops, according to the Pentagon and congressional sources.
It's impossible to know what portion of the arsenal slated for destruction — valued at $1.2 billion by the Pentagon — remains viable because the Defense Department's inventory systems can't share data effectively, according to a Government Accountability Office report obtained by USA TODAY.
The result: potential waste of unknown value.
"There is a huge opportunity to save millions, if not billions of dollars if the (Pentagon) can make some common-sense improvements to how it manages ammunition," said Sen. Tom Carper, D-Del., and chairman of the Homeland Security and Governmental Affairs Committee. "Despite years of effort, the Army, Navy and Air Force still don't have an efficient process for doing something as basic as sharing excess bullets. This Government Accountability Office (GAO) report clearly shows that our military's antiquated systems lead to millions of dollars in wasteful ammunition purchases."