Do you shoot unjacketed rounds through your Glock barrel, or through an aftermarket barrel? Reason I ask is because Glock doesn't recommend shooting raw lead through factory barrels because of their polygon design.
I do shoot through my factory barrel. I dont shoot much at a time. But I also clean it really good. Not had a problem yet. I'm just now learning how to do jacketed reloads so the few I did on my own have me nervous lol but I'm lucky to shoot once a month. And maybe 150 rounds per month.
I buy my bullets from rozedist.com they are zero bullets and I have good luck with them. I also buy my brass either from guns shows I go to or from centerfirebrass.com they also have great pricing so check them out.