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Originally Posted by
Godallmighty
Yeah, might work on a rifle, or even carbine at "reasonable" distance, (100m+) I agree!
But the DoD issued round was not designed for targets close, neither to be a low velocity round (as fired from a SBR)! The 5.56 was not designed for close range, it was designed for "Average Battle Distance".
If you ever fired 3 rounds into a target on close range and the guy runs away, you know that the gun they gave you is crap (or the round at least)! Standard FMJ sucks on close rage!
Hydrostatic chock is not a myth dude! its called SECONDARY CAVITY in oldschool! language ;) and... books are nice, but reality teaches you one thing or two! Whether it's logic or not!
Actually, yes, I have fired multiple rounds into a human being at close range. It was M855, it fragmented and the guy dropped like a sack of shit.
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hydrostatic - relating to fluids that are NOT IN MOTION
shock wave - a pressure wave traveling FASTER than the speed of sound
When a bullet impacts a target, a pressure wave is applied, but unless it is traveling faster than 5,052 ft/s (sonic speed in salt water), it will not cause a shock wave in tissue; it is simply a strong pressure wave. The tissue is obviously in motion, as evidenced in many videos, so it is not hydrostatic. Therefore, there is no such thing as true hydrostatic shock. There is hydraulic shock, but only with bullets impacting at greater than 5,052 ft/s. What we normally see is simply a very strong pressure wave that creates tissue damage when the psi level exceeds the natural strength of tissue (widely varied, but you could estimate 500 psi).
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I thought of some additional stuff too. Temporary wound cavities are areas where the tissue strength has been exceeded far enough to cause tearing and destruction. These can be just a lethal as permanent wound cavities if they are located properly, BUT in the case of permanent, the tissue has actually been REMOVED by the momentum of the projectile, so bleed-out can occur more rapidly if the tissue damage isn't enough to kill.
Please follow the link I posted earlier and read the information in that forum. It will open your eyes to the world of terminal ballistics.