Again, not knocking headshots. If it's the only thing the shooter has, take it. Practice them. They're absolutely essential in some situations. Know that the IDPA and silhouette type targets won't distinguish an ineffective mouth or sinus shot from one that ruptures the cranium, and that shots to different parts of the brain will have dramatically different effects. As for vest-wearing targets, the pelvic girdle is easier to hit than the head, but one should also be warned before targeting this area: “Shots to the Pelvic Area”. Wound Ballistics Review. 4(1):13; 1999.