I really don't want to derail this thread any longer, so I'll simply reiterate that there's a whole archive of threads on using handloads in SD down in Law & Civil Rights. Most of your arguments have been addressed in considerable detail there.
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman