9mm ammo for self defence

[Texian]

In searching this site for information on this topic I have found a wealth of information that cost me a bundle in books, and took lots of time researching on the internet and asking about on other forums to find before finding it all right here. There's still so much for me to read and learn from the unique perspective of Special Forces Soldiers regarding so many topics. Thank you, Quiet Professionals, for such a terrific, informative website and for allowing me to be a guest and gain from your collective wealth of knowledge.

Now to my question:

I own a SA XD 9mm Service model. Being rather new to handguns, I've been practicing with Winchester White Box 115gr FMJ. I used the same ammo when I took my CCW exam (passed with a near perfect score. Not bad for a FNG!). Because this is the ammo I'm most proficient with thus far, I decided on the same ammo but in JHP (of course). From what I've read and been advised, this is not a bad choice. However, I was wondering what the Special Forces Soldiers, other Servicemen, Veterans, and all others in the know here would advise on this topic. I've noticed most of you prefer larger calibers, but I would like to hear what you all think is best in 9mm ammo. I'll be in silent mode reading. Thank you in advance for any reply.