Glock is one of the only guns I'd buy, clean and lube, fill magazines and be totally ok competing with it. After the match, where I'd likely experience no issues, load with carry ammo and then carry it.
I have, on multiple occasions, bought a Glock and put a couple mags through it straight from the box then into the hoster it went. Factory copper grease and all. I don't recommend that to anyone, but I have.