As the others have said once you get you PAL you should not have any trouble importing anything that is not considerd "prohibited" in Canada.
The firearms will have to be registered of course and since you are importing them they will have to be verified.
Verifications are done by volunteers approved by the Government and check to make sure the firearms is as described on the registration, i.e. serial number , make, model, calibre, barrel length, etc. There is no fee for this.
For what are called restricted firearms (handguns and certain rifles), once they are imported you can not take them anywhere without what is called an ATT (Authorization to Transport) usually issued for 3 years. This is an additonal piece of paper that you have to apply for. In Ontario to get this you have to belong to a gun club, take the club safety course, wait for a probationary period (duration varies) and then the club will apply for your ATT for you. This process can take from 3 to 6 months but once done renewal is pretty much automatic (again done by your club).
Welcome to Ontario
Approx what area are you moving too?
Are you going to stay here permanently?
What kind of shooting do you do mostly?
We can let you know where shooting clubs are, etc. There are lots around.