Regarding ammo, I recommend throwing the pistol at an assailant, hard!!
OK, seriously, I'd probably opt for FMJ, purely for feeding reliability. HPs are unlikely to expand, so penetration should be pretty close to FMJ.
I can't speak from personal experience as to the Bauer, but my old Fraser has always functioned reliably.
As an unsolicited opinion, I will NOT rely on a .25 ACP for personal defense, unless I cannot find anything else. I'd rather have a double barreled derringer in a meaningful caliber. At least, if I hit someone, they'll know they're hit.
I've personally experienced drugged up and/or mentally unbalanced homo sapiens (dunno if they could be classed as human beings) shrug off hard blows from nightsticks and Bucheimer saps (yes, I'm an old codger; we used to carry them in side pockets of uniform trousers). Please bear in mind that I mean HARD blows delivered by strong cops, with full adrenaline.
Most of my fellow officers "on the street" regarded a .38 special snubbie with +Ps as the minimum worth carrying. I agree. Whenever I consider carrying a mousegun, I think back to some of the situations I actually experienced, ask myself what would have happened if I'd shot one of those maniacs with a .22/.25/.32, and go to the trouble of carrying my.38 snub (if not a real sidearm!).
Now, as I mentioned in an earlier post, these li'l .25s are just plain cute! I still have my old Fraser, purchased new, many years ago. I just don't rely on it for any serious purpose.