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What exactly does the SAAMI PSI mean in relation to firearm wear and tear.
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When your pistol was made, it was made with the SAMMI specs for the caliber it was released in. I assume that the G22 is a 40 S&W caliber pistol. Or rated at 35,000 psi, the gun was setup and timed at that pressure to function properly.
I too played with the 357 Sig conversion on a FNH FNP-40. The 357 Sig is rated at 38,000 psi. I shot maybe 10 rounds out of the gun and decided that while I liked the 357 Sig performance, I was not crazy about how it beat up the pistol. The slide takes more abuse and the frame and fire control group is defiantly shaken up. One thought I had was to change the recoil spring to a heavier one and absorb the additional recoil. Never did get around to it, traded the gun in on a 45 ACP instead.
My basic impression while doing the 357 Sig conversion, was that if I wanted a 357 Sig, I would just go out and buy a gun made for that caliber. And have the correct parts to start with. (and a stronger frame). If I had to do it over, I would start out with a 357 Sig and convert it to 40 S&W. (but why do that?)
But that's just my view on it, others may disagree.
Jim