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Originally Posted by DPB
FRISteve, you're disputing things I haven't said. I never said that 1500 PSI was a huge difference, in fact, I never said "1500 PSI" at all. I did intend to suggest that 5000 PSI, which is the difference between 9x19 and .357 SIG is a significant difference.
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No - I wasn't specifically talking to/at you - just speaking in generalities. Now, I do think that you're fudging the numbers by comparing 9x19 'target loads' with full power 357Sig. Compare apples to apples and you get 40k vs. 38.5k. Same-same, in the grand scheme of things.
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Apparently, I was not able to effectively express what I was trying to say, I'll try again:
If you take two otherwise equal platforms (like a G17 and a G31), and one is chambered for 9x19 and one is chambered in .357 SIG (like a G17 and a G31), the one firing the higher pressure cartridge will break more parts and have a shorter service life.
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No different than if you shoot nothing but full house +Ps out of the G17.
One other thing to remember - SAAMI specs are MAXIMUMS. That does NOT mean that all 357Sig rounds are **at** 40kPSI - it means that they can not exceed 40k and be SAAMI spec in that caliber.
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So, a G17 will require less parts replacement and have a longer life cycle than a G31. A G17 that fires only 9mm+P ammo will have a shorter life cycle and break fewer parts than a G17 that fires only standard pressure ammo.
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I agree
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So, otherwise equal gun + higher operating pressure = shorter service life. No one has said anything yet that refutes this. If you have any facts that dispute this, I'm more than willing to read them.
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But to what degree is the life shortened? In 1990, everyone was making the same argument in relation to the .40S&W - guns will wear out faster...blah...blah...blah. I have a G23 with 82,000 rounds through it...okay - maybe I'll only get 500k through it, as opposed to the 1million+ that some G17s have digested, but that'll be okay by me.