I don’t mean to belabor this but I don’t think the problem, at least until recently, was/is a problem on this side of the line. Canada Post changed it’s regulation to deny the shipment of inert munitions, supposedly in response to a concern over national security. When asked what was meant by “munitions”, no one would give an answer. To you and me it means things such as bombs, grenades, mortars, etc. but without a clear definition it could mean anything that a customs agent says it is.
I am not talking about the import of commercial quantities of brass or parts which require permits but the trading of an empty case or two by shooters or collectors.
Anytime I contact an official to get an answer and they tell me they do not know, it sends up a red flag. That is exactly what has happened. I dropped the issue the first of the year and maybe things have become clearer since then. That’s why I was asking you what you had learned.