Thought I would add my two cents in here.
I've been bowhunting with compounds and trad bows for 47 years. When bowhunting with trad bows, the lighest recurve I've killed a deer with was 36#. The heaviest recurve I've killed a deer with was 44#. The last 5 deer I've bow killed with a recurve, the shot distance has been between 12-17 yards.
The two recurves I bowhunt now with are 37# and 42#. These bows; when bowhunting whitetail deer, small feral pigs (I like to eat tender young wild pork) and javelina with an arrow tipped with a very sharp 2 blade broadhead waiting for a broadside lung shot at 20 yard shots and under......kills these animals, with a short recovery distance because no animal goes far without lungs, just as easily as any 45#, 50#, 55#, 60#, 65# or 70# recurve or longbow.
Two years ago, one of my friends got the notion he wanted to move up in poundage from 45# to 55#. He practiced for 4 months with his 55# recurve. Bow season came along and he shot a doe at around 18-20 yards. He gut shot the doe and I think it was because he was overbowed, but he doesn't think so. We trailed the deer for at least 300 yards. We never found the deer, but the coyotes found it during the night. BTW, the next season, he went back to his 45# recurve.
Don't under estimate what a 40# recurve or longbow bow can do if you do your part in placing an arrow tipped with a very sharp 2 blade broadhead where you want it to go (hit) on an animal. In my book, accuracy trumps poundage.