make the detents in their containers just a little larger. That would allow one to simply pick the primers directly from the container to primer tubes, with out play with flip trays.

something like small primers in a large primer container


rattle too much I guess

Primer packaging is made that way to prevent chain reaction explosion, the close fit is supposed to limit explosion to one primer and not set off all the others.

UPS is heavy on the supposed to---(hazmat fees)

Don't think another mil would make any difference