Gatofeo is right, sheetrock isn't much of a bullet stopper. The key to not having rounds wind up in a neighbor's apartment is to do what you can to make the fight as short as possible. Accurate, hardhitting gunfire with a good JHP is the best way to make that happen, not powder puff loads that are more likely to allow an attacker to press on after being shot. Less lead in the air is the best way for the homeowner and neighbors to come out intact.