Citat:
Ursprungligen postat av
Ove Mollvik
Den väsentliga iakttagelsen från sårkanalens utseende gäller inte kulans hastighet i sig utan att den måste ha haft ett starkt spinn för att kunna gå rakt igenom kroppen och inte börja tumla och böja av som kulor från kortpipiga vapen vanligen gör.
Att normala helmantlade kulor ändrar kurs och gör ett större hålrum, när det träffar ett material/vävnad, är naturligt.
357 metal piercing, stansar mer ett fint hål.
Lite tankar från en del som läst för mycket Gun's n Ammo:
Inga Källor:
"The famous example of such a blunder was the assassination attempt on US President Ronald Reagan that took place on March 30, 1981. Then, the shooter used an armor piercing bullet with a normal revolver, which actually deprived the bullet of its ability, contributing to the bullet missing the heart by less than one inch and piercing his left lung instead, which likely spared his life."
That whole "tumbling" thing is a relic from Viet Nam, when relatively inexperienced military doctors were observing the results of small-arms fire without any working knowledge of ballistics.
Any round that "tumbled" in flight would be wildly inaccurate.* This is referred to as "keyholing" (from the shape of the hole in the target) and is the sign of a worn-out barrel.
Most bullets are quite stable aerodynamically.* If viewed in ultra slow-motion, some very minor deviation in rotation can be seen but the bullet is still stable around it's center of gravity.
When a military FMJ (full metal jacket) bullet strikes flesh, there is an immediate and very destructive energy dump that acts like a hydraulic force, in all directions at once.
The bullet looses velocity very rapidly, and as it does so, it may take a course wildly tangential to it's original path.**
This isn't "tumbling" as the media had it back in the 70s... The bullet is loosing energy and changing course.
Often the destruction, especially with high-velocity bullets like the 5.56 Nato, is very great in flesh.
Again, that's due to the sheer energy transfer, not the mechanical path of the bullet.