Reading over this thread, it occurs to me that the environment in which the injury occurs makes a big difference. I have mostly deal with blunt force trauma in a wilderness, or at least outdoors, setting, typically the result of falls. I have never encountered a penetrating chest wound, and only one limb amputation, in something like 200 or so cases. But if I were in a combat,range, or other firearms intensive environment, the PCW would be a lot more common. Tailor your kit to fit your circumstances. The injury profile associated with a bombing or combat will be very different from what you will see out in the woods. Study up on improvisation - there are always exceptions to every trend.