I think if it were a close range thing like a urban situation, it would either do enough internal bleeding to kill you or hurt so bad you'll wish you didnt even put the armor on.
the penitration may not be the danger i remember hearing that the actual impact may cause enough internal trauma to kill you. ya it may not penitrate but it would push the vest pretty deeply and i belive thats why kevlar doesnt work on rifles. cause the can make kevlar vest thick enough to stop a rifle bullet but the trauma of the vest catching the round will kill u due to internal bleeding and things of that nature.
Not likely. Sorry guys, but a shotgun puts out as much energy at the receiving end as at the launching end. I have yet to see a person bleed to death from internal injuries from firing a shotgun, even when pressed against the chest. I have fired my 870 from the chest.
The kevlar, if rated for the projectile, will essentially 'catch' the projectile as it comes in and several things happen to slow the projectile. First, the thickness of the kevlar spreads the impact over a larger area, so that the energy that makes it to the skin isn't as concentrated. Second, the kevlar and body have a certain amount of give that slows the projectile down further before the projectile reaches the impass and is fully stopped. Third, the incoming projectile will attempt to penetrate the kevlar weave and will cause tugging of the fibers, some of which will yield with friction, thereby removing still more energy. And last, the impacting round may actually crush and obliterate some layers of kevlar on impact, further draining of the incoming round's energy.
The reason why kevlar doesn't work on rifles isn't because if the vest was thick enough to stop the bullet that the trauma from the impact would still cause all sorts of internal injuries. Most rifles rounds are not stopped by kevlar because the spitzer piont passes between the weave. There is no "catching" of the projectile as with slower rounds or even something like a .45-70 round nose or soft point. So to stop a pointy rifle round, the round needs to pass between enough layers of kevlar to be slowed by friction as it passes between the fibers and weave. This will be a relatively slow stop, requiring lots of layers more than normal, and dissipating potentional impact energy over a much longer period of time.
Most vests protect the torso. The torso is also projected by the rib cage. It will take a tremendous amount of force to transfer a bullet impact into a blunt force trauma through the vest and rib cage enough to kill the person from internal injuries.
Yes, some folks shot with pistols and shotguns while wearing vests sport some very nasty bruises and some deep bruises. Second Chances used to have their SAVES book and it has some great stories, with some pictures as well. There are folks who are shot in the vest with significant calibers and during the heat of battle, don't even realize the vest has stopped the incoming round. There are others that felt like somebody hit them with a hammer and they have some goodly sized bruising. There are few reports of internal damage such as to organs.
Part of the rating of a ballistic vest by NIJ includes the blunt force indentation to a clay backing that is X number of centimeters. Sorry, I don't recall the specifics. A vest does not pass a given rating if the rounds penetrate the vest or the clay backing is indented more than a certain amount.
What does this mean?
It means that a lowly IIA vest will stop 00 buckshot. The highest rated soft armor, IIIA, will stop 12 ga slugs. Here is a 'ballistic wheel' showing ratings and example rounds. Sorry, I no longer have the list of the specific rounds, but you can obviously find the 12 ga loads. Note that IIA has the least protection, the II, then IIIA. Level III vests, not shown, are hard armor as are level IV vests.