A defense attorney would argue with a knot in a tree. Depending on the scenario, and if there was legal justification to take a life, you should be ok. As long as someone presented a clear threat and you are in the right, there is...but there isn't much an attorney can argue. As long as you can articulate what happened and why you did what you did and as long as you are clearly in the right, you will be fine. If you can articulate that your life was in immediate danger and you were in "fear", they can't touch you, especially if you have witnesses. The modifications are to help the shooter become a better shot so he/she can stay on target, and so that there are no stray rounds flying into something they are not supposed to hit. Like I tell others that carry concealed, be a good witness. If you don't have to get involved, don't. Your life will turn upside down if there is any question about what happened. It will be rough enough if you were in the right. Let me know if this helps, take care.