You are disappointing me again Evan....
Once again you are taking crap from right wing sources and not even verifying its validity.
Here is the full copy of the treaty
INTER-AMERICAN CONVENTION AGAINST THE ILLICIT MANUFACTURING OF AND TRAFFICKING IN FIREARMS, AMMUNITION, EXPLOSIVES, AND OTHER RELATED MATERIALS
You can see that it has ZERO impact on those who wish to reload their ammunition. It only concerns you if you illegally traffic your reloaded ammunition to another country who participates in the treaty. So if you reload your own ammunition, this treaty doesn't concern you, but if you ship it down to the cartels without going through proper procedures, you will be held accountable under this treaty since Mexico signed the treaty on 11/14/1997
THE SAME DAY the United states signed it.