As I have said, 147g Ranger in 9mm. But have switched to NATO 124g hard ball in the spare Glock 17 magazine. I think maybe if I get to expend the 16 rounds in my Glock 19, I might be dealing with things to shoot through?
I personally use 147GR black talons... if those ever run out, I'll be forced to use something else. I had good luck with 147GR gold dots with hunting, so I'll probably use that for bad guys too.
HK doesn't recommend using 147 gr ammo in their pistols. Nor do they recommend +P+. Suits me just fine. I carry Gold Dot 124 gr JHP and still have some 124 gr Black Talon +P ammo. The Gold Dot 124 gr works well in my HKs and no doubt would leave a mark on the bad guy it is intended for. With only 200 rounds of Black Talon left from back in the day I'm going to save it for a special bad guy. He should be proud if the day ever comes that I use it.