If you want to go beyond the quick and dirty, then adjust the DV for shots to areas that would incapacitate or kill easier. For instance, if you call a shot to the hand, leave the DV as is. If you call a shot to an unprotected head, add a couple (or more) to the DV to show how much more dangerous it would be to get hit there.
Of course, remind everyone that by making combat this much more dangerous, it's also just as dangerous for the runners to stay alive. Especially against snipers.