While I do carry factory SD loads in my handguns, if the type of ammo is the only thing that an attorney can question/challenge, I have to think that all the other factors involved in the shooting under question must have been pretty solid....
Whether it was due to excellent training, the so-called Command Presence, or just Dumb Luck, in almost 30 years as a LEO, serving drug warrants, arresting armed bank robbers, etc... I never had to shoot anyone and only two times can I remember drawing an off duty weapon in an incident and one of those was in the aid of a uniformed officer having trouble with an arrest on a busy street to keep some by standers from jumping into the fray...That's not to say that I didn't approach a serious situation on duty with a firearm at the ready...And in those situations, I preferred my 12ga...
If you are always aware of your surroundings and what is going on around you, you can negate most confrontations that would require the use of a weapon and if a subject gets the drop on you, I would seriously question your ability to draw and fire successfully to end the situation in your favor...Only if it is obvious that the subject immediately intends to harm you, or someone with you, would it be feasible...Hopefully, you can wait, or talk, your way to a point where the situation is in your favor, rather than the other guys...