The main things causing Kabooms you have to really worry about with Glocks are:
1) Poorly done reloads... Mainly overcharged, bullets not crimped and set back
2) Bullet setback (chambering the same round over and over)
I have been through the Armoror's class three times, and the advanced armorer's class at the factory. Never once has anyone said, don't use steel cased ammo...... However Glock says OVER AND OVER, Use only quality ammo.....
Now for my two cents worth...... Steel cased ammo is not quality.