I shoot a crap-load of reloads. That sounds more like the round failing, rather the gun. Sounds like the Glock handled you OK.
If it's an older Glock, it might just be a matter of time before you have a KB.
The gun had a shit-ton of reloads shot through it, but I was shooting Winchester WB through it at the time. The chamber disintegrated, the frame cracked, the mag was shot out the bottom, and what was left of hte front of the chamber was bent up.
I called Glock and they accused me of shooting reloads (I had the damn box of WWB when I called) and wanted me to send the gun to Georgia. When they got it, they said there was nothing left of the chamber (No shit, that's what I told them), and therefore nothing left of the case to prove it was the reload's fault, or the gun's fault.
If it was a reload, they were gonna tell me to pound sand, but since it could not be determined, they offered me a new gun/case/mags for cost ($230). Since I was shooting a buddy's gun at the time, I had to replace it.