You may get a visit from the government: http://www.poststar.com/articles/200...l/14551013.txt

Note this part of the article:
There are also concerns that some larger calibers, or those used by military-type weapons, could be banned, restricted or taxed more heavily.

One northern Warren County resident found out recently the government is paying attention to such ammunition sales.

West said a customer of his recently stocked up on .223-caliber rounds, a caliber often used in assault-style weapons. The customer bought 1,000 rounds a few months ago through a mail order company. Shortly after the purchase, he received a visit from the U.S. Department of Homeland Security, whose interest was apparently piqued by a large-scale purchase of that caliber.
Not to worry though. I'm sure nobody on this forum would ever make "a large-scale purchase" like 1000 rounds.