Yet another 40 hater who listened to James Yeager and did no research on his own. The SAAMI spec on BOTH 9mm and .40 S&W is 35,000 psi. Except 9mm +P is allowed to be 38,500 psi. So of the two, 9mm is the "high pressure" round.
And I have yet to see any empirical evidence that a pistol wears...