Hans: I'm afraid to tell ya that in nys if you go to a bigger slug to make up for the fewer number of rounds you can carry in your pistol, them cuomoites will see you as a cowboy just lookin' to 'down' the first bad guy post the new gun ban, and I have no doubt that cuomo will send his personal eye-talian mafia legal lawyer team to fry your silly butt.
I would have to agree with Lloyd - go for a 10mm and use some nuclear detonating type round that will leave about a 2 foot hole in some bad guys chest. Not necessarily speaking from experience in using factory off-the-shelf self defense ammo, but if you have to make up for the number of rounds lost to legalities with pure explosive, blast'm to pieces (here, swallow this lit stick of dynomite and try to keep it together..), totally devastating, leaving a lesson for the crowd to see type ammo, then go for it.......