That's funny, I mail cast bullets all over Canada and beyond, to my friends, and have never had a problem with CP in this regard. The businesses that i deal with in the USA will not ship any bullets to Canada(individuals), but this is a US export problem,[emphasis mine-S.] not Can. Cus. or CP.
We are prob. entering a hornets nest here, but if Ben is correct (and from what I've read in the "sticky" on importing/exporting, he is; no amount of bullets or brass can be exported from the US w/o a permit, irrespective of Canadian regs.) that would suggest that the companies whose products have been successfully received by CGN'ers as per this thread, could be in very deep doo-doo with the US authorities if they do not have export permits and their transgression is discovered. Hopefully, if this is challenged - as it ought to be if CP is in error - it will not filter down to the US side. As far as I know, the only US company that seems to be authorized to send bullets up here - according to their website, anyway - is Hawk Bullets.
It's all utterly ridiculous of course, but that's never stopped bureaucrats before.