From what I can discern, Glock doesn't even recommend reloads. In fact, IIRC, shooting reloads might even void the warranty.
It will gobble up the Winchester white box bulk packs from Wally-world no problem, not much out there cheaper. A guy I knew shot up a bunch of turkish WW II surplus 9mm through a 17 and 19 without a hiccup.
As far as your concern about the constant "conditon 1" of the Glock, with a heavy trigger it's no more dangerous than a DA revolver.
"In fact, IIRC, shooting reloads might even void the warranty."
Every firearm warranty that I have says that because if a firearm does go KB who knows how that round was loaded. It makes perfect sense and I reload.