I have a friend who recently experienced a kaboom in his G 21 45 acp Glock. Fortunately he was not hurt; but it did scare him. The cause was a wrongly loaded 45 acp round. Bothered him enough that now he jokingly refers to his Glocks as the Austrian hand grenade. Now I have heard of kabooms with 40 caliber Glocks and 45 caliber Glocks; but never with a 9mm Glock 17 or 19. Has anyone heard of a kaboom with a 9mm?