I'm not sure about the idiot thing (unless you pick choice "c" below), since I just want to get an idea about what you are trying to accomplish. Also, no one is attempting to dissuade you from using HPs, just those you make yourself, for defense.
Are you just trying to roll your own for a) strictly plinking, b) getting a feel for what bullets and brass work best, then extrapolating this to factory ammo choices that you will use, or c) making some super duper hot rod round that you in tend to carry in a defensive weapon, have them jam, and end up dead?
I would trust myself less than any computerized factory to make a decent, reliable feeding load, esp. since even these don't always work well. Some guys have done things like loaded backwards WCs as a first round, but that is a far as I'd go w/ handloads for self defense in a semi-auto.
Additionally, consider the liability of shooting someone with handloads, whereby the prosecution claims you loaded an even more deadly round and were itching to use it at your trial.