Since, as you alluded to, this type of air gun seem to fall under the same restrictions in Canada as regular long guns (e.g., the need for a PAL), I'm curious what advantages an air rifle would have over a simple 22?
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Victory awaits him who has everything in order — luck, people call it. Defeat is certain for him who has neglected to take the necessary precautions in time; this is called bad luck. Roald Amundsen