I had the same problem during my CHL class... but it was someone else's bald head that was taking the beating.

The PA63 ejects shells at a pretty good velocity at about 4:00. Generally they land somewhere between 10 and 15 feet away. Well, during the shooting test, we were positioned shoulder to shoulder almost, and my spent casings were going straight into the head of the guy to my right. A few of them hit square on with the lip side and drew a little blood in a .363" crescent shape. I felt pretty bad about it, though he
did disregard the instructions about bringing a baseball cap to deflect spent brass. I've since installed a heavier recoil spring, which I think has cut the distance to more like 6 feet, but still probably enough to smack someone in the head again. I think next time around I'll request the far right position if I'm qualifying with my PA63.
