If anything sums it up neatly, its that. There's non of this rubbish you see on the big screen (or the small one) where the hero cops for one in the leg then 5 minutes later has nothing more than a bit of a limp, or a shoulder wound but is still able to climb a rope/shoot with both hands/have a fist fight etc.
Even if 'fortunate' enough to have a through wound without hitting bone, a major blood vessel or an organ, chances are the bullet will have dragged some foreign matter into the wound -typically strands of clothing- which will infect and kill in a surprisingly short time, especially in hotter climes.
Kids in gangs who carry guns really, truly have no idea just what a firearm will do to a person. All they know is that they make a noise and the other person stops bothering them. And thats a frightening though, because a kid will never think of anyconsequences before pulling a trigger.
My father was involved with armament research many years ago.He often remarked(when conversations switched to guns after yet another news item)that bullets can be easily modified to make them more lethal and that the worst damage caused to pigs(they used pigs to test weapons on)was from a round ball(muskets)which left an 8" hole on entry & a much larger exit wound.
At a farm I used to work on during school holidays,the garage contained an array of various air-rifle pellets.The farmer had bought them many years earlier whilst on holiday in the USA,the pellets came in hollow-point,round-faced,flat-faced and other shapes.We tried a few types on rabbits,some would leave 1" or more holes in the rabbit.There was even an "armour-piercing" slug,had a high-tensile pellet with a plastic skirt and was able to punch holes through fence posts.