Usually jurisdiction has to judge the means you used to defend yourself and the facts that lead you to the conclusion that the used force was required. As a trained person you should be able to assess the situation faster and better than an untrained person and you should be able to use the intended amount of force.
E. g. a black belt martial artist may have a harder time to explain why a hit to the throat should be considered as accidental than an person who never had a self-defense class. A veteran police officer may be expected to actually hit the leg instead of the center of the torso when aiming for it.
Many people make the Wrath Of The Law come down on them by the way the handle the situation afterwards. Never say more than "I was involved" without your lawyer. The wrong version of the truth can very well spoil your day. Again a trained person should perform better than a layperson.