Oh Boy....................this will start up a war of words - just like it always does.
COULD a perps family's lawyer try to use the fact that you made your own "killer" ammo to slay the criminal??? Yes - freakin' lawyers will try anything to make a buck.
But here is the truth, up until now - there is absolutely ZERO evidence available that this has ever been successfully used in a court of law. In one's defense, all you have to do is point out the number of personal defense rounds being sold as such today by various manufacturers and their attack would become moot. And let's face it - EVERYONE knows guns can kill, and typically juries could care less about what particular bullet was used. Any jury that shares at least a half of a brain between the group, should see that as a totally vain attempt to obtain some sympathy.
Oh, BTW..................if you ever have to defend yourself in such a way - empty the mag, clip, etc on them. Dead men can't sue and the families of such deadbeats rarely do sue because they have already written them off as dead anyway and have little or no knowledge of their whereabouts or activities. (As a side note - it can be argued that emptying the clip was an instinctive act of preservation on your part, further justifying that you felt you were in mortal danger).
The biggest thing in defense is to make SURE that deadly force was necessary in the first place. If you know the law and that it was a "righteous" shoot - even if you end up in Civil court, you should come out smelling like a rose because the authorities would have already cleared you of wrong doing.
That's my 2 cents worth, anyway.
BTW - I do load my own defense ammo..................not because I make it more powerful, but because it is more accurate - Thereby putting any innocents in the area at less risk of being hit by an errant shot (another good court argument in your favor).