I'd echo what others have said - my Scorpion pistol has eaten everything I've put in it without issue.
In terms of ballistics, since the Micro has a 4" barrel, you're going to get expansion/penetration performance comparable to a handgun. Federal 147gr (or 150gr) HST would be a great choice for home defense - lots of expansion, and very consistent performance. HST is my top choice for defensive rounds these days.