So I was told by the gun shop owner that I go to that the 9mm and .40S&W perform too similar to tell a difference. He served 22yrs training state officers how to handle their weapons. He said he ran ballistics tests, etc, etc...and he said when the 2 are tested...shot through leathers, car doors, seats, glass...they perform identical. He said the only thing you get different from the .40 is a bit more recoil, and slightly dirier blast. I guess he meant gun powder.??? obviously.
But, a little more powder, and a slightly bigger ball...it must even out.
But, a little more powder, and a slightly bigger ball...it must even out.
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