I have hunted for quite a number of years with a recurve bow. Deer, bear and turkey mostly.
50 pounds will kill anything in the lower 48 presuming proper arrow placement. Of course shooting distances must be kept as close as possible. I prefer 20 yards or under. Most of my hunting was done with bows in the 48-50# range, however of late that has decreased to the lower 40's.
Be aware of course that hunting with traditional archery gear is a challenge and that it is also highly addictive