For another perspective on this, here are the calibre/projectile weight/impact energy requirements for hunting in Norway
"For moose, red deer, follow deer, wild reindeer, wild boar, wild sheep, musk ox, wolf and bear, ammunition with expanding bullets weighing a minimum 9 grams is required.
a) ammunition whose bullets weigh between 9 and 10 grams (139 and 154 grains) must have an impact energy of at least 2700 joules (275 kg/m) at a range of 100 metres.
b) ammunition whose bullets weigh more than 10 grams (154 grains or more) must have an impact energy of at least 2200 joules (225 kg/m) at a range of 100 metres.
When hunting roe deer, beaver, wolverine and lynx with a rifle, expanding bullets with an impact energy of at least 980 joules (100 kg/m) at a range of 100 metres must be used."
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