Crossbow Big Daddy Bio Shock

If you have already acquired the crossbow from the level with the artist about half,way through the game and you have some spare trap bolts, there is a very simple way to kill the big daddies, Simply fire trap bolts at the Big Daddy, and you will find that they do significant damage. After you have shot the bolt you may want to move a bit because if you get a direct hit and you do not move, you will be hit as well.