The only way you can ship this brass is to deprime it. UPS FedEX DHL will not touch it even at their factory stores/hub. You have to use a 3rd party approved shipper the same reason we can't ship powder or primers.
Hope this info might help. I have never seen or heard of anyone using the BR-4. CCI does not advise it either as the BR is not a magnum primer like the 450.
4,000 Primers for the 8lb Varget/4350 2500 For the 5lb RL17
Can do 4lb jugs of the Varget and 4350 for 2000 Primers
FTF CMP Talladega, North Atlanta, Chattanooga TN