While I agree with this, I don't think the courts will. They can use this as a "premeditated" crime. Nothing but standard hollow points from a reputable company is what I would use. Anything with "bio shock", "extreme" or otherwise, even +P can look like you where planning for this and/or wanting it. It needs to look to the jury that you didn't intend to get into this situation but managed to get the upper hand and save everyone
It sucks, but it does seem the courts look at it this way all to often
While I understand the argument, anything under a 5" barrel will have better expansion and penetration with +P because you won't actually see the the muzzle velocity you expect with a standard round. You can get Hornaday critical defense which seems to be designed for shorter barrels and is what I have in a .45 3" barrel Kimber CDPII because it cycled the best.
Either way, only put hollow point in it at home so you don't have over penetration if it gets used. Too many people don't understand it's to stop over penetration from standard ball ammo and not all about more "damage"