I don't think it was the guns fault either. Glocks are known to blow apart with over pressured rounds, typically more so with .40 S&W due to normal high pressures designed into the round.
I wonder if the bullet was set back in the casing too far, creating too much pressure? Glad you are o.k. either way, a pistol blowing apart isn't a fun experience (I had a PT Taurus do the same ).
On another note, any ammo maker can and do screw up with the manufacturing process. It might be worth researching the serial # to see if it is on a recall list.
Let us know when you find out what Wolf will do for you.