As to Canada and handguns......Forget it. Only the criminals carry Handguns there.
but nearly useless for true survival uses outside an alley fight.
Sasless. When in Alaska I carried my nice S/W 649 (44Mag)with some good hot loads. S/W has also come out with a 50cal Hand hurter.
But I prefer the Winchester Trapper in 44 Mag. Short, easy to get in the aircraft. And Canada will allow it. If you can find one of the older Ruger Carbines in 44 Mag, also good. Its very hard on Wabbits though.
Suggestion above as to over under is not a bad idea. something like Savage produces.