Best handgun round?

[S&Wshooter]

Originally Posted by Mazryonh

I've heard that fully-loaded 10mm out of purpose-built 10mm handguns has less felt recoil than fully-loaded .40 S&W, despite the fact that .40 S&W was a downloaded version of the 10mm. Is it because 10mm handguns are built larger and heavier than .40 S&W ones, since the latter were intended to be very similar in size to 9x19mm handguns?

This'n here

.40 exists because someone took a look at the 10mm load the FBI was using and figured out they could get the same performance out of a shorter round, allowing for a smaller gun with a higher capacity. Honestly the 1006/1076/whatever they issued was kind of wasted on the piddly pop 10mm load they were using