There is another thread on this forum discussing this subject!
Unless the shipper, you, have the proper licensing, common carriers cannot accept primers for shipment!
The DOT, FAA and ATF are not you friend!
Here's some examples of penalties that the DOT and FAA have handed down found on another thread:
$53,550 Coty US NY two ounce bottles of perfume via FedEx
$70,000 Matarah Ind. Milwaukee, (Insect Repellent via UPS)
$51,000 MSC (2 boxes of WD-40)
$70,000 Penalty - Queen Nail and Beauty Products (PA ) (nail polish via UPS)
$60,000 Dreamworks SKG three butane lighters via FedEx
$51,000 Tristar San Antonio, Perfume via UPS
These are minor compared to attempting to ship primers!