I’ve been reloading ammunition for the past 25 years.  I’ve reloaded 9mm, .40 S&W, .357 Sig, and .45 ACP.  I’ve never had a problem with reloads in any of my Glocks.  The only issues that I have heard of is after initially firing a cartridge, the base of the brass case will bulge more than other guns because the chamber is looser.  I’ve never experienced this issue and maybe it’s because I make sure each of my cases going all the way up inside the resizing die at the beginning of the reloading phase.

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