I have shot several wild feral hogs with bow. I think a springer is not enough gun. I once tried to kill one with a 22 pistol and it almost got me before I took it down with a .308 rifle. A bow of 60 lb is fine with an aluminum arrow and a strong tip. -- a word about what happens when you shoot a wild hog with a bow. - unless you shoot them in the head or spine, they will run a ways. How far depends on how good the hit is. A heart shot will stop them faster than a lung shot. There is a lot of grissle to protect the lung cavity. Tracking a wounded hog through the brush in the dark is very dangerous. I found that, with practice, I could hit them in the head at 20 yards from my tree stand with a 60 lb compound bow and drop them in their tracks. With an aluminum arrow tipped with a Muzzy 130 grain broadhead, I could penetrate enough bone for a clean kill. If you wound one, they often attack.