Well first of all, I never said that having or using a high-cap mag (pre or post ban) was illegal, I stated that it would be problematic under certain circumstances.
Second, Your speculation of my being an "internet expert" reveals your own lack of experience, for I am a former LEO and current NYS licensed armed guard, which may or may not mean much in some people's book, but the fact is you don't get that license without knowing article 35 inside out, upside down and backwards in addition to knowing every aspect of the legal responsibilities of having a pistol license and the obligations that go along with gun ownership.
I'm not looking to argue or get into a who's right and who wrong pissing match, but I stand by my words, legally justified or not, if a person uses a handgun (as I said before, hopefully in a defensive manner, not unlawfully...which is a whole other nut) and it is discovered through (as you pointed out, any shooting will be investigated thoroughly) you are only asking for ADDITIONAL problems by adding to the mix something that the public and those in the legal system will use to find a way to criminalize YOU, though you have done nothing wrong.
Take for example something I see in our newspapers all the time. Headline: "Man arrested on XXXX charge... found in possession of gun loaded hollow point bullets..."
Now you know as well as I do, there is nothing whatsoever illegal about having HP's in your gun... but in the papers and in the minds of the general public you may as well have committed the ultimate crime in being found in possession of them.
Example:
Prosecutor to defendant: "Your gun was loaded with hollow point bullets. Is it not true that hollow point bullets are specifically designed to inflict more injury to the person that you hit with them?"
Defendant: "Yes, they are designed for that purpose."
Prosecutor: "Then it was your intent when you shot Mr.X to kill him wasn't it?"
Defendant: "No, it was my intent to stop him from harming me."
Prosecutor: "Wouldn't normal bullets accomplish that goal?"
Defendant: "Well, yes, they probably would."
Prosecutor: "But you loaded your gun with something you knew to be more lethal, isn't that right?"
Defendant: "Yes, I chose bullets which purposely inflict greater damage."
Prosecutor: "Then I'll ask you again, with the knowledge you intentionally loaded your gun with ammunition designed to inflict greater harm to the subject you shoot, it must have been your pre-meditated goal to kill him when you shot at him, wasn't it?"
etc etc etc....
The above paraphrased exchange actually took place in a civil court case as a result of a man defending himself against an attacker whom he in fact shot, and subsequently killed, and the dead man's family sued for wrongful death....and WON. Why? Not because he was in the wrong in any way shape or manner, but because the prosecution successfully manipulated a jury into believing that by using HP bullets in a gun there could be no other way of interpreting one's intent in doing so other than to kill whoever you might shoot with them.
Nothing illegal there, however the fellow in question was in fact found guilty of the wrongful death of the guy he shot in self defense and it ruined his life.
That's a true story to make my point I don't care how righteous you may think you are in doing something that on paper is perfectly legal. I'm telling you by EXAMPLE, not opinion that you can in fact make matters worse for yourself no matter how legitimate your intent may be.
Now if you want to be hard headed and carry a handgun with a perfectly legal 12, 13 15 or 100 round pre-ban magazine in it... then hallelujah!!! God bless America, you go right ahead and I'll support you 100%... however, that doesn't mean when you get car jacked at gun point and you opt to blast the bastard you won't have as many additional legal problems on your hands as you did extra rounds in your magazine when you did it. If you believe otherwise then you don't know as much about the world we live in as you think you do.
You put another 20 or 30 years of living on this planet than the 20-something I'm figuring you are, and you will wake up one day and realize what I'm trying to tell you.
Life ain't lived in a book son.
That's all...peace and happiness!