Canada is the U.S.'s neighbour and is probably closer, culturally, than any other nation. Gun ownership is also high in Canada. In terms of guns per capita, the U.S. is #1 by a long shot, but Canada is #7 [1]. In Canada, guns owned per capita is one third of what it is in the U.S.. Canada also has mass shootings. The annual deaths from mass shootings per capita in Canada is 0.032, which is about one third that of the…
"Where many U.S. states permit concealed carry of handguns, handguns are virtually illegal to carry in Canada. Transporting them from your home to the range is legal, but they must be unloaded, locked, and permits are required for the transport." I see no mechanism by which those laws would reduce mass shootings. A mass shooter would simply ignore them. The other policies you mention may be more relevant, but it goes…
School shooters are usually teenagers with easy access to a gun at home. They don't have a criminal history or ties to the underworld, they're loners. It's really a question of whether dad has a concealable firearm. In Canada, they do not.