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AR15.COM
7/14/2008 9:31:46 AM EDT
Much is said about bullet ballistics, that a bullet fired from a gun will have marks that match it up with a certain gun. What I want to know is, how do they figure. I figure when a firearms company is manufacturing guns and when they go to rifle the barrel, don't they use the same tool to do as many as they can until the tool wears out? Wouldn't that mean that all the firearms in that run would have the same kind of marks on the bullet. Inquiring minds want to know.
7/14/2008 9:34:56 AM EDT
[#1]
They use the same tools, but those tools will change with every use.
Metal on metal contact will form the barrel, but erode some of the tool.
7/14/2008 9:35:28 AM EDT
[#2]
who did you shoot?
7/14/2008 9:36:47 AM EDT
[#3]
There are still microscopic imperfections lift in the rifling that are characteristic to that particular firearm.  The "class characteristics" (right or left hand rifling, # of lands and grooves) will be applicable to a specific make and model of gun, but the marks left on a fired projectile are distinguishable from gun to gun.  
7/14/2008 9:36:51 AM EDT
[#4]
next time, phrase the question "Hypothetically..."
7/14/2008 9:37:05 AM EDT
[#5]
I have heard from a forensics teacher of mine that bullets fired out of Glocks can not be matched to a specific gun because of Glock's barrel shape. Is that true?
7/14/2008 9:37:25 AM EDT
[#6]

Quoted:
who did you shoot?

I thought I would get that response. Just a question I've wondered about.