If you mislabel it, or don't label it, and the package has problems, you can expect to have two FBI or ATF agents on your front porch VERY quickly.
The law is the law guys, please don't get in trouble by avoiding the requirements, especially in todays atmosphere!
On top of that, have you ever watched them unload the semi-trucks? I've noticed that if it says AMMO or ORD on it that they handle it much more gently, no 20 foot tosses!
Now the real funny is why you can ship ammo without the explosives surcharge, but have to pay a surcharge for primers?
Bill