Forum Overview :: Operation: Hammer Time
 
Actually that's been commonly known among terminal ballistics for years by Senor Barborito 04/15/2003, 6:46am PDT
MOAB wrote:

The FBI recently released the results of a study on the penetration/lethality of 5.56 (.223) ammunition, unfortunately it is (the study) law enforcement only. The gist though is that 5.56 is a poor penetrator of drywall and car doors, but when used correctly (in a rifle with an 18" or better barrel, not a sexy but useless SMG form factor) and at correct velocities, it becomes immediately and horrifically frangible in soft tissue. Meaning the round disintegrates when it hits anything besides people.

This has nothing to do with launching 2mm flechettes at 7800FPS through a SpaceGun but hell, there is nothing going on here but a funeral or some shit anyway.


I used to post about this shit a lot on OMM (about two years ago) and the effects in the whole Black Hawk Down scenario re: Paul Howe's comments on wishing he had 7.62, and his (valid) distrust of the 5.56/M4 combo.

See here for some good information.

The most important bit is this image:



This is on M193 ammo, which shatters less completely than the larger M855 does at lower velocities - see here and here - note the velocities at which the respective impact images occur.

In regards to the inlined image, it would help if you got a sense of velocity-barrel length correlation. Why is this important? Because terminal velocity is a result of force from exploding powder applied over time inside barrel, and long barrel = longer time for force to act on projectile. I've lost the great link I had back on OMM to one of Colt's licensed manufs. for the AR-15 family, but the velocity range according to the manufactuers are from very low (900-910m/s) muzzle velocity (and rounds lose velocity fairly quickly over distance) for the 11" Colt Commando, 930-950 m/s for the 14" (M4), 970-980m/s for the 16" *(M16A2), and in the the 1000+ range for the 20" and 24" (sniper) barrels.

Anyways, if you want more info, read anything and everything you can find on the web by Dr. Martin Fackler on the topic - he's a good and incredibly informative author on the subject of terminal ballistics and as someone who had no real interest in even guns at all before reading him, I can vouch for his ability to make the material seem very interesting. I wouldn't have gotten interested in guns at all were it not for him - he transforms the topic from a bunch of good old boys sitting around drinking and talking about cars into a real science. You can learn a bit more about his work here.

--SB
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Brits develop weapon based on old Flying Circus episodes by Diotallevi 04/09/2003, 9:37pm PDT NEW
    Death by smearing. by Nixon 04/09/2003, 11:21pm PDT NEW
        laser guided anvils next? NT by FABIO 04/10/2003, 12:19am PDT NEW
            I was thinking laser-guided rebar and drywall NT by Ray, of Light 04/10/2003, 12:30am PDT NEW
            I hear ACME is working on a catapult-launched version with DU rounds NT by Entropy Stew 04/10/2003, 12:33am PDT NEW
                Early test results: by laudablepuss 04/13/2003, 6:31pm PDT NEW
        Re: Death by smearing. by t0ny 04/11/2003, 3:04pm PDT NEW
            Re: Death by smearing. by Chairman Mao 04/12/2003, 5:18pm PDT NEW
                Wow by I need clarification 04/13/2003, 6:42pm PDT NEW
                    Re: Wow by t0ny 04/14/2003, 10:50am PDT NEW
                        Right by Senor Barborito 04/15/2003, 4:21am PDT NEW
                            Re: Right by MOAB 04/15/2003, 5:21am PDT NEW
                                Actually that's been commonly known among terminal ballistics for years by Senor Barborito 04/15/2003, 6:46am PDT NEW
                                    The bullets in that image are scaled for a 21" monitor, btw NT by Senor Barborito 04/15/2003, 11:00am PDT NEW
                            Re: Right by Chairman Mao 04/15/2003, 11:26am PDT NEW
                                Re: Right by t0ny 04/15/2003, 2:38pm PDT NEW
                                    Re: Right by Senor Barborito 04/15/2003, 2:52pm PDT NEW
                                        from the, not through the - sorry NT by Senor Barborito 04/15/2003, 2:53pm PDT NEW
                                    Re: Right by Chairman Mao 04/15/2003, 3:01pm PDT NEW
                    speaking of long-ass weapon development times by FABIO 04/15/2003, 11:53am PDT NEW
                        Re: speaking of long-ass weapon development times by Chairman Mao 04/15/2003, 11:57am PDT NEW
                            christ by FABIO 04/15/2003, 12:18pm PDT NEW
                                Re: christ by Chairman Mao 04/15/2003, 12:25pm PDT NEW
                                    Re: christ by FABIO 04/15/2003, 3:16pm PDT NEW
                                        Re: christ by Chairman Mao 04/15/2003, 3:42pm PDT NEW
                                            Re: christ by Entropy Stew 04/15/2003, 6:51pm PDT NEW
                                                yeah by Chairman mao 04/15/2003, 6:57pm PDT NEW
                                                    Perhaps I'm confusing my bombers NT by Entropy Stew 04/15/2003, 8:29pm PDT NEW
                        Re: speaking of long-ass weapon development times by MOAB 04/15/2003, 1:18pm PDT NEW
                            wha? by FABIO 04/15/2003, 3:21pm PDT NEW
                                MiG-29 NT by Entropy Stew 04/15/2003, 4:26pm PDT NEW
                                    I'd rather have an F-15 with modern American avionics, thanks. by laudablepuss 04/15/2003, 7:11pm PDT NEW
                                        Re: I'd rather have an F-15 with modern American avionics, thanks. by Beast-God 04/15/2003, 7:53pm PDT NEW
                            Two can play this game by Beast-God 04/15/2003, 8:03pm PDT NEW
                                I guess he won't be playing the violin again. by SBDMT 04/15/2003, 8:16pm PDT NEW
                                Re: Two can play this game by MOAB 04/16/2003, 6:28am PDT NEW
                                    Re: Two can play this game by FOF 04/16/2003, 10:06am PDT NEW
                                        You're Sumerian? NT by FoK 04/16/2003, 10:07am PDT NEW
                                            everyone know egypt always builds the first city (also: the crete dilemma) NT by foogla 04/16/2003, 10:29am PDT NEW
                                            Re: You're Sumerian? by FOF 04/16/2003, 11:36am PDT NEW
                                        No, he's saying he's Chinese. by Chairman Mao 04/16/2003, 11:48am PDT NEW
                                            Non-Western Civilizations don't count. NT by FoK 04/16/2003, 11:59am PDT NEW
                                            Re: No, he's saying he's Chinese. by MOAB 04/16/2003, 3:08pm PDT NEW
                                                Re: No, he's saying he's Chinese. by Chairman Mao 04/16/2003, 3:13pm PDT NEW
                                                    Raises hand in Mao-like fashion for Chinese solidarity by FOF 04/16/2003, 3:15pm PDT NEW
                                                        Just so this is clear... by Chairman Mao 04/16/2003, 3:27pm PDT NEW
                                                            Re: Just so this is clear... by FOF 04/16/2003, 3:35pm PDT NEW
                                                                A/S/L??????? NT by Cupid 04/16/2003, 3:54pm PDT NEW
                                                                I'm down for this faggotry... by Chairman Mao 04/16/2003, 7:04pm PDT NEW
 
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