More accurate? In the house, lol?
I think it would be ok but you should walk around your house with they eye that you were going to attack the house to spot the weak point that would probably be used for entry. Then you can back off and see if your carbine is indeed compact enough (or not) to easily defend these points. The extra penetration could indeed be your friend if you needed to shoot thru the wall to get them. The Wife's holed up with the pistol.