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I've heard the same but have no personal experience with them.Been a while since I read it but supposedly the early gen S&W 10 mm had issues with loose fitting mag's causing jams and the mag's falling out.
We ended up getting heavy recoil springs and magazine springs. Changed everything and have shot two mag each no jams no mag drops or anything.I've heard the same but have no personal experience with them.
You could try the copper jacketed ammo. I had some FTF's with 9mm in a SW Shield and going to the copper jacketed stuff solved it.
FWIW, My Stock G20 has been 100% with 700rds of that Underwood and Double Tap 200g hard cast ammo and that was before the cherry coating lube.
It's only when you go to the after market barrels with tighter chambers that you start to see problems with the Glocks. Stock, they just plain work.