Sorry for your troubles. I'm surprised that S&W didn't fix it correctly. Makes you wonder if they know what they're doing. Maybe just going thru the motions

I have all older Smiths except for a M&P22C that I got last year.

3 of us used to shoot golf balls for $$ with 22 pistols. If you were having a bad day, it could get expensive. 2 of us used Ruger semi-autos and 1 used a H-S. We were pretty well matched. In the mid-70s, I got a 41 (5 1/2") and practiced with it a lot. I started walking away with the $$. The other 2 guys then bought 41s (7 1/2"ers) trying to catch me.

The point of the story is that all 3 of the 41s were totally reliable. I don't remember a failure of any kind. We mostly used HV ammo but used anything really. We weren't aware of the "use SV" recommendations. I don't see any damage to the slide, chamber, etc...

After about 25 years I DID need to replace the recoil spring on mine, it started to fail to eject---- Only problem I've ever had. Many 1000s of rounds thru it.