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Originally Posted by DPB
First I want to apologize if the length of my posts taxes anyone's brain capacity. SAAMI max chamber pressure for 9mm is 35,000 PSI. .357 SIG is 40,000 PSI.
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Don't forget 9x19 +P (which is a more fair comparison to 357Sig) - 38,500
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This doesn't seem like a lot, except that the max for .357 Magnum is also 35,000 PSI, and the max for .44 Magnum is 36,000.
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As mentioned above, you left out 9x19 +P, but my point was that many people say that .40S&W and 357Sig are such "high pressure cartridges" (their words, not mine) - I like to point out the realities.
And while you seem to think 1,500 psi is a huge difference, let's compare it to .45acp and .45acp +P: 21,000 and 23,000 - for a difference between 9x19 +P and .45acp +P of 15,500 - not **that's** a large difference.
What does it all mean? Nada. But when people start discussing the super high pressures of one cartridge versus that of another cartridge, the facts sometimes help.