If it effects my ability to exercise my Second Amendment rights...

...it damn well is a Second Amendment issue. My ability to purchase ammunition effects my ability to use my firearms. The Federal Government can be trusted with a list of what ammunition I buy like they can be trusted with a list of the firearms I own. That's not at all. Finally, my rights aren't subject to what occurs south of the border. There are laws in place to deal with exporting ammunition already. We don't need more regulating ammo sales within our borders.