Handguns are not illegal in Canada as many think. But extremely strict. Not sure about non residents, I am sure there are websites.

I believe they must be over 4". Which is why S&W model 69 44 mag is 4.25". What is really F'd up, is they are not allowed to be loaded in house.

Since you are not going to be able to carry it concealed, legally, I would just use that powerful rifle when out in the woods, for whatever.