ALWAYS REFER TO THE SAFETY DATA SHEET FOR TRANSPORTATION INFO.
Open this link scroll down to section 14 transportation
Afraid they are considered an explosive.
I DID NOT read it all there may be qty exceptions.
NO. I've bought thousands of them over the years and never paid a hazmat fee. They do need to be packaged in a cartridge box that holds each case seperately. Same type of box loaded ammo comes in or similar.