There are restrictions defined by fire codes and Federal DOT concerning transporting ammunition components like primers and powder.
https://saami.org/wp-content/uploads...oc-Primers.pdf
It's limited to 25,000 primers in a vehicle.
Powder is limited to 100 lbs:
https://www.law.cornell.edu/cfr/text/49/173.171
and it has to be packaged inside inner packages (i.e. 8 lbs).
I believe California has special laws on transporting loaded ammunition:
https://www.nraila.org/articles/2015...transportation
https://oag.ca.gov/firearms/travel
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Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.