Chumleyhunts;
Good evening to you sir, I hope that it's at least thinking about starting to warm up in your part of the world.
Here's a link to the RCMP fact sheet on firearms, which includes links to the Firearms Act.
http://www.rcmp-grc.gc.ca/cfp-pcaf/fs-fd/powder-poudre-eng.htmThe part which concerns your query is answered with the following quote.
"All matchlock, flintlock and wheel lock long guns are considered antiques no matter when they were made. Like older firearms of these types, they are exempt from the licence and registration requirements set out in the Firearms Act."
It's interesting that I'm aware of one individual who has a lifetime ban from owning firearms who legally possesses and hunts with flintlocks.
The rationale of them drawing a line at flintlocks and not including percussion cap arms escapes me to be honest, perhaps someone had a scary black one with a pistol grip or something.......
Anyway sir, if it was me I'd try to communicate with the Customs folks too, just to make sure they're up on Federal Law and then if they appear to be, I'd print out a copy of the above fact sheet to bring along with me when I crossed the medicine line.
As far as powder goes, as long as it doesn't appear you have enough to lay siege to a fishing village, I'd think they'd be okay, but again it never, ever hurts to ask the powers who control access to your hunting grounds - Canadian Border Services.
Hopefully that was useful sir, all the best to you all this spring and good luck on your hunts.
Dwayne