I have killed them this way in the past, you may only get one lung, but let them go long enough and I guarantee you will have a great blood trail. I just let them go for 2-3 hours before going to find them if they don't crash in sight. The last time I did this, I only got one lung on a big doe, and she only ran 30 yards before piling up. I would not recommend doing this though unless you have practiced it a lot.