I came across this article recently and it made me scratch my head and laugh. How reliable of a source do you consider this guy?
I had to laugh when I read the first sentence about he .40 and the 10mm too.
some excerpts below:
.380 ACP (9mm Short, 9x17mm, 9mm Kurz)
Now we're getting into some decent stopping power. The three or four best .380 JHP rounds have better stopping power than ANY bullet fired out of 2" barrel .(38 special +p)
The most effective handgun round on the market, regardless of caliber, is the Federal .357 Magnum 125 grain jacketed hollowpoint (C357B). This load has more stopping power than any other handgun cartridge and this includes more powerful rounds like the .41 and .44 Magnums.
.40 Smith & Wesson
This caliber has established an excellent track record on the street. Smith & Wesson and Winchester really did their research when they invented the .40 S&W.
The 10mm has not lived up to expectations. It was thought to be the ne plus ultra of pistol rounds when introduced in the late 1980's, but hasn't turned out to be superior to the better 9mm,