I use Corbon 165gr HPs in my Kimbers, and the Condo’s walls will easily stop them. A cheap apt’s walls might not, though. A S&B 230gr FMJ is a whole ‘nother story: it’ll blow thru 2 walls and a perp’s chest. Those are best-suited for outdoor use, not home defense. I use both in different Wilson Combat 8-rnd mags.
Eight rounds sounds like a rather good resource, particularly if you have another clip or two.
Your talk of the grain loads is a bit over my head, but I understand the concept you’re addressing. I haven’t worked with adjusting loads.