polygonal rifling = no forensics???

500grains

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<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Polygonal rifling prohibits the forensic firearms examiner from microscopically measuring the width of land and groove impressions because the lands and grooves have a rounded profile instead of a well-defined rectangular profile.</div></div>

http://en.wikipedia.org/wiki/Polygonal_rifling

True or bogus wiki crap?
 

Queequeg

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Re: polygonal rifling = no forensics???

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Shot In The Dark</div><div class="ubbcode-body">Shoot ice boolits and you don't have to worry about it. </div></div>

Delete this before "they" see it and force us to micro stamp our Ice projectiles
laugh.gif
 

ssgp2

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Re: polygonal rifling = no forensics???

Never mind the ice, use pure sodium bullets.
laugh.gif


Or potassium....
<object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/l9z5-mJ8NZk"></param> <param name="wmode" value="transparent"></param> <embed src="http://www.youtube.com/v/l9z5-mJ8NZk" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"> </embed></object>
 

FF_T_Warren

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Re: polygonal rifling = no forensics???

well they may not be able to measure the lands and grooves, but thats not really what they use to match the bullet to the rifle anyway. they use all the lil striation marks and things on the round that make it particular to that gun, not so much measurements.
 

former naval person

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Re: polygonal rifling = no forensics???

Or, as one "mystery novel" used in the plot line, beat the man to death with a frozen leg of lamb, then cook it and serve it to the inspector who comes to investigate the murder.
 

500grains

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Re: polygonal rifling = no forensics???

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: former naval person</div><div class="ubbcode-body">Or, as one "mystery novel" used in the plot line, beat the man to death with a frozen leg of lamb, then cook it and serve it to the inspector who comes to investigate the murder. </div></div>

Fine idea.

But what do you do with the floorboards, the furniture and the walls which will have red spatters on them??
 

smokshwn

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Re: polygonal rifling = no forensics???

500grains,

It doesn't mean no forensics, it only means there is no way to accurately measure the width of a land nor a groove. There are however still plenty of forensic indicators to be used.
 

Queequeg

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Re: polygonal rifling = no forensics???

The best bet for not getting caught is Brujeria, or voodoo for the knuckle draggers...

No one ever got convicted for sticking pins in their rival's likeness
wink.gif

 

ROLEXrifleman

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    Re: polygonal rifling = no forensics???

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: queequeg</div><div class="ubbcode-body">No one ever got convicted for sticking pins in their rival's likeness
    wink.gif

    </div></div>

    No.... but I almost got busted sticking something in my rival's wife!
     

    Queequeg

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    Re: polygonal rifling = no forensics???

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ROLEXrifleman</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: queequeg</div><div class="ubbcode-body">No one ever got convicted for sticking pins in their rival's likeness
    wink.gif

    </div></div>

    No.... but I almost got busted sticking something in my rival's wife! </div></div>

    Did she look like him?
    crazy.gif
    laugh.gif
     
    G

    Guest

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    Re: polygonal rifling = no forensics???

    Ninjer snipers recover dey bullits. No trace. None.
     

    The Mechanic

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    Re: polygonal rifling = no forensics???

    Nothing would leave more conclusive evidence than shooting my HK-91. How many .308's out there have poly barrels and shoot fucked up brass as far as the bullet goes?
    Bullets that come out of polygonal barrels give more evidence of the weapon fired IMHO.
     

    Grump

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    Re: polygonal rifling = no forensics???

    Less forensics doth not = NO forensics.

    Clues abound, including primer residue in many instances. Some brands have certain elements that others do not. Possession of ammo consistent with what was used in the crime is one more brick building the masonry gallows, so to speak. One incident I personally know of led to a quick guilty plea because the single fired case found at the scene matched what was in the suspect's magazine, which was "downloaded" by exactly one...and the ammo was rare for the area. Breechface markings didn't help ID the actual gun, but everything else did.

    Less forensics doth NOT a failure to "clear" the crime make.