since you are sober think if you were in court after you shoot an intruder and they try to prove you accidentally discharged the pistol you were using, and they try to prove you were untrained and unfamiliar with the weapon. who will look better to a jury? the guy who has documentation as to proficiency and can enter files, records other evidence without having to take the stand or you just saying im a good shot and i it was not an accident. why do you think cops have to qualify every year or 6 months, its a liablity thing. if you dont see what i mean just do it anyway and you will be better off in case something happens, or consult an attorney and pay for the same advice i gave.