I handload my 223s, and my fur load is a 55g Sierra SP at 2750 fps. That load nearly always exits, but leaves only a small exit hole.
If you're stuck with factory loads, then I'd stay away from the SPs. The 55g SPs at factory velocities can make a huge exit hole. A 40g V-Max, or Balistic-tip load would likely not exit if you can hit bone(shoulders) going in.