From the OP photo, fhey appear to be cartriges, not bullets.
In this day and age, how would anyone who plans to travel by air not know of restrictions on the carriage of such restricted by air? Did he also have a Ned Kelly suit in this baggage?
I believe that millions of Thai are liable for income tax but never declare or pay it. Consequently, this relief might only be claimed by big spending civil servants and registered companies.