The recoil can only be described as shockingly painful. It is a bit much for any creature currently living on Earth. It would be great for a T-Rex, but there are none left where I hunt. I love my .577 NE, but I wouldn't take it bird-hunting. Not because it would be overkill, but because it is the wrong weapon for a moving target.
Different weapons are good for different things.
Stay with me on this. Years ago, when I was a young and stupid 181 pound lifter, most of my deadlift training was stiff-legged off blocks. BUT - I couldn't do much more than that conventionally. I was always disappointed on meet day, because my deadlifts would stall at the top. Stiff-legged deadlifts off blocks are a great exercise, but my deadlift sticking point is at the top.