A well shot animal, especially a deer, don't need a lot of tracking. Concentrate more on what bullet your using and learn to use the bullet you have. I knew a guy years ago in Montana that was certain that a 7mm Rem Mag with a 175gr bullet was no good for black bears, said he'd shoot them and they would run off. So he sold it and bought a 458 Win mag; still couldn't kill a bear!
The point is that if your not using what you have right, it doesn't matter what you have, and if you are, it still doesn't make a lot of difference what you use.