Why Rob Pincus now prefers the 9mm over .40 S&W...
A pretty good read HERE
1. The Myth of the “One Shot Stop”, Part 1: Faster Strings of Fire are Better.
2. The Myth of the “One Shot Stop”, Part 2: Higher Capacity is Better.
3. Negligible Difference in Practical Wounding Potential.
4. Lower Cost, High Value Practice
There you have it. Those are the four primary reasons that I now recommend 9mm as the personal defense round of choice, have been converting my own personal .40 S&W firearms over to 9mm and would never purchase a .40 S&W firearm for personal defense if I were starting all over today. I let anyone who asks me about defensive guns or bullets know how I feel today, despite years of recommending the .40 and talking about how it was a great compromise between the 9mm and .45. In the mid-90’s I was wrong about the advantages of that round and I have definitely changed my mind about the inadequacies of the 9mm. Acknowledging that I was wrong in the past, is the only way that I can share what I now believe is the best recommendation I can give.