Sounds like dribble I've read from Ayoob (sp?).
My take on it is that self defense should not be taken lightly; one must be responsible!
Therefore, "Why would a good guy use those 'cop-killer' bullets"? I'll reply with something like, "Since they are popularly used by law enforcement, they must have been thoroughly tested. In fact, Federal HST, 147gr has proven to adequately expand its diameter into gelatin WITHOUT penetrating over a maximum limit set by FBI protocols. It would be irresponsible to knowingly select a bullet that would penetrate too much, perhaps hitting an unintended bystander behind the perp. This same bullet will maintain it's momentum through glass, for instance not deflecting who knows where like some light weight high velocity bullet might. Again, why risk potential by-standers with a lesser round? Additionally, I wanted to ensure that god-forbid it came to this, that I would adequately stop an attack in protection of my self and loved ones".
Prosecutor: "So, you've obviously modified your pistol with a hair trigger, just waiting to go off before assessing the situation, or perhaps just going off on its own!".
Response: "No, I fired the gun intentionally in self defense and have never had an negligent discharge in all my practicing. I originally had a trigger so stiff that when practicing for self defense scenarios at the gun range, especially one-handed shooting I would torque the gun during the shot and miss horribly to the left or right (depending on which hand). Just a small angle off at close range could equate to several feet at distance beyond the attacker. I thought missing the intended target that badly would be irresponsible, potentially hitting innocent bystanders in the background. An overly stiff trigger resulting in L/R misses is IMO why trained NY City Police actually shoot so many unintended victims. I just couldn't be that irresponsible, which is why I invested additional money in tuning my SD gun as such".
Anyway, you get the idea. WHY are you making such decisions about your carry gun and selection of gear? Is it to be more responsible? Knowing and perhaps documenting such changes and shooting results in a log for future reference could be helpful, but as others have mentioned here, a good shoot is just that. You have more to worry about the court of public opinion, that the thug happened to be a different color than you or perhaps a different sexual orientation, etc. Things that shouldn't "Matter" but have been allowed to cause riots with the assistance of an agenda-driven media and politicians fanning the flames for their own self interests.