Can they own a .303 without many hassles? PS: I already know the answers to these questions.
I have a couple Canadian friends, and 1 really good Newfie.
Actually, the answer might surprise you. A .303 is often a hunting rifle, and Canadians have done as much as they can to keep hunting rifles OK. It is handguns they have mainly gone after. As long as it is a bolt action, it would not be that much hassle.
And you said they "do not have much freedom". There are countries that do make it a pain in a neck to own a .303, is that the only freedom you can think of? There are other freedoms in society.
