SW Iowa Hunter is right. If you dont get a complete pass through, it is almost always because your broadhead encountered bones. The opposite front leg is ussually the culprit. Your bow could go through two deer. A 40 lb bow is capable of getting a complete pass through on deer sized game so 57 is obviously enough. I shoot a 45lb and get many pass throughs. I have also had many many heads still stuck in the animal. Some times the arrow is still protruding out an inch or so. You can always unscrew the broadhead. Just when you gut the deer, be careful when you reach into the chest cavity. carefully feel around for the head. Most likely, it's stuck in the other arm outside of the rib cage. If you hit the bone on the entry side, then the broadhead might be stuck dead in the ribcage. All you have to do is look for it. It's very hard to get cut by one. Especially if you have allready thought about the situation. If the arrow is inside, it will be very easy to see.

Nic