Question about 9mm Luger FMJ

I'm have a Springfield XD-9 Sub-Compact, and I plan to start concealed carry when my license gets here. (I sent it off in December, but there is supposed to be a 3-month delay). I use Winchester 115-gr FMJ when I target shoot. Is there a problem with using this ammo while CC-ing? Will 9mm ammo go through a person? (I saw that 9mm FMJ went through 12 sheets of drywall on a website). I'm a fairly good shot and I shouldn't have any problems hitting someone in the chest at defensive distances.