Combat effective hit the nail onthe head. Bean bag and other such such rounds are not NON LETHAL, they are LESS LETHAL. Meaning there is less of a chance that the person being shot will be killed. With this in mind, the rules of engagement are the same. If there is a reasonable chance that the person may be killed or seriously injured you are still held to the same level of justifaction. Obviously if you are already there, why would you choose a less lethal option? Less lethal rounds are primarily used when confronting sucidal subjects. It gives us a tool that will incapacitate them and allow them to be safely taken into custody