I don't know for sure but I got a feeling reloading supplies are fix'n to get expensive or hard to buy if not out-lawed all together. Check this out...
http://www.chicagotribune.com/news/sns-rt-us-usa-explosions-bostonbre93f06t-20130415,0,4257583.story
http://www.chicagotribune.com/news/sns-rt-us-usa-explosions-bostonbre93f06t-20130415,0,4257583.story