The debate happens on just about every gun board and for the most part is supported by fans of this caliber or that based on performance in gel tests ... Ummm which we all know are real life results right
If the debate is to be taken seriously then there should be enough data available on real life shootings to quell the fringes. From what I have read to date ... the caliber that IS the stopping champ is the .357 in 125gr.
Having said that .. I agree .. shot placement is nearly everything and I will reiterate .. gang bangers are using 9mm 115gr win white box to kill each other in record numbers. When you get your ammo from the trunk of a car choices are limited.
Still ... I usually use 124 gr standard pressure gold dots or HST's in my 9mm's with 4 inch bl but were I to drop to a shield size gun I think 147 is a good suggestion. The gold dots I started purchasing and have a ton of after finding out what Cops were using at the time.