Glocks are notorious for loose and unsupported chambers. This enhances feed reliability. It also decreases case life if you are a reloader. Otherwise it is not an issue. If it is an issue for you, you can purchase an aftermarket barrel with a tighter chamber with better support. But doing so usually hurts feed reliability.
I have a glock 10mm.
Don’t reload currently, but I was considering it. I would need to get all the stuff to do it and I just don’t have room right now. This is good to know, so I will keep the information in mind. I’ll also take a look at my casings more closely next time I shoot.
When I purchased the weapon, the guy that sold it to me showed me how to field strip it - seemed pretty darned solid to me, but what the heck do I know... I’m really not that up on all of the technicalities of it.
I suppose I could always get the aftermarket barrel and see how I like it (sometime in the future), and always revert back if it causes me problems.