A decently accurate 9mm will chew the middle out of a B27 target at ranges far beyond the 30 yards mentioned. Any good handgun will, some much better than others. Although I prefer larger heavier projectiles, it is true that advances in bullet design have taken the 9mm Parabellum into pretty decent territory. If I were limited to a 9mm only, and had quality ammo I certainly would not feel undergunned by any means at all.
A couple of my bucket list guns are 9mm's, a Belgian Hi Power, a Sig P210 to name two of them. I got to play with a Waffen marked Luger last spring which was too cool. It made me want to invade Poland.
"A Liberal is someone who doesn't care what you do, as long as it's mandatory". - Charles Krauthammer