[giantg2]

My friend worked at UPS. He said you could always tell when someone had bullets shipped because of the rattle and heavy weight. He said those were probably the most common heavy shipment they saw.

[quercusa]

The big ORM-D* sticker was a pretty good clue as well.

*'Other Regulated Materials - Domestic'

[giantg2]

Finished cartridges aren't nearly as dense as actual bullets. Those don't require ORM-D sticker.

[aparks517]

Only required for finished ammunition, not for bullets alone.