Massachusetts and New York both require a license. Basically in locations where possession of a firearm is restricted to licensed persons the ammunition is also

Massachusetts and New York both require a license. Basically in locations where possession of a firearm is restricted to licensed persons the ammunition is also typically licensed. The exception is locations where only some types of firearms require a license to possess because the ones that don't require a license usually take the same ammunition as the ones that require a license. That doesn't happen in the US AFAIK.