[Mr Twisty]

Found a saami brochure that looks pretty legitimate

Small Arms Ammunition and Primers, Smokeless Propellants, and Black Powder Propellants
11-1 Basic Requirements.
11-1.1 In addition to all other applicable requirements of this code, intrastate transportation of small arms ammunition, small arms primers, smokeless propellants, and black powder shall comply with US Department of Transportation Hazardous Materials Regulations, 49 CFR, Parts 100-199.
11-1.2 This chapter applies to the channels of distribution of and to the users of small arms ammunition, small arms primers, smokeless propellants, and black powder.
11-1.3 This chapter does not apply to in-process storage and intra-plant transportation during manufacture.
11-1.4 This chapter applies to the transportation and storage of small arms ammunition and components.
11-1.5 This chapter does not apply to safety procedures in the use of small arms ammunition and components.
11-5 Small Arms Primers
11-5.1 Small arms primers shall be transported or stored in containers approved by the US Department of Transportation.

11-5.2 Transportation of small arms primers shall comply with US Department of Transportation Regulations.
11-5.3 No more than 25,000 small arms primers may be transported in a private vehicle.
11-5.4 No more than 10,000 small arms primers may be stored in residences.
11-5.5 No more than 10,000 small arms primers may be displayed in commercial establishments.

http://www.saami.org/specifications_...01-Primers.pdf