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  • packnrat
    Veteran Member
    • Feb 2007
    • 3939

    knowing what gun fired the shot

    on the tube the cops say the gun that fired the shot..by make and model

    Is this possable.?

    I thought only the cal


    .
    big gun's...i love big gun's
  • #2
    pingpong
    Calguns Addict
    • Apr 2008
    • 5450

    Between the casing and bullet, I'm sure ballistic forensics can figure out which type of gun it came from.
    Originally posted by luchador768
    We also had a lot of wannabe gangsters putting the display pistols down thier pants to "try them on.". If you bought a display handgun from the Riverside Turners in the 1990's there's a greater than average chance that there is cholo crotch on it.

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    • #3
      Fjold
      I need a LIFE!!
      • Oct 2005
      • 22905

      If it has unusual rifling in the barrel maybe. Combinations like left hand twist, twist rate, number of grooves, ratchet rifling, in particular calibers may be able to narrow it down.
      Frank

      One rifle, one planet, Holland's 375




      Life Member NRA, CRPA and SAF

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      • #4
        Riodog
        Banned
        • Feb 2006
        • 1127

        Depends upon the specific crime lab BUT yes they can tell you just about everything except for the serial number. (that might nbe in the future).
        Rio

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        • #5
          Booshanky
          In Memoriam
          • Dec 2007
          • 7822

          Yeah, how exactly do they figure that out? If they only have a bullet, no casing, is it possible to tie that down to a certain gun?

          What about guns that use polygonal rifling rather than the norm, like Glocks and HK's?
          "Please use the comments to demonstrate your own ignorance, unfamiliarity with empirical data, ability to repeat discredited memes, and lack of respect for scientific knowledge. Also, be sure to create straw men and argue against things I have neither said nor even implied. Any irrelevancies you can mention will also be appreciated. Lastly, kindly forgo all civility in your discourse . . you are, after all, anonymous."
          -Barry Ritholtz


          Help be a better advocate for the 2nd Amendment here.

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          • #6
            JHC
            Senior Member
            • Dec 2005
            • 1382

            What if the bullet came from a rifle that had started life as a different caliber but had been rebarreled in something else (Yugo M48 sporterized into .308)? Might throw them for a loop.

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            • #7
              Mike's Custom
              Senior Member
              • Nov 2007
              • 872

              Generally no. I watched one show where the woman CI looked at the bullet and told make model and cal. Certain guns can be determined by the size and number of lands and grooves. They may be specific to certian models but generally it will take some time. Just like on CSI Miami they get DNA results back in minutes. Or they search the national database for finger prints and find the owner in seconds. Just doens't happen that way.

              This above misinformation is why we have so many stupid guns laws. People watch TV and see a full auto shoot thousands of rounds when it has a 20 round mag and would be empty in about 2 seconds. "Well knowbody needs a gun like that"... and I have heard people say that. Then you explain to them that the gun they just saw shoots full auto at a rate of 900 rounds per minute and that 20 round mag would be empty in about 1.5 seconds.

              I did see on "Life" detective Cruise had his gun over to the LT and before he did so he removed the mag and ejected the round in the chamber and hten looked inside before he handed it over. Now that is what the shows should show to the public. And they should stop calling semi autos "automatics".
              "Gun control is not about guns, it is about control"

              Mike's Custom Firearms 661-834-7836
              http://mikescustomfirearms.com/

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              • #8
                SJgunguy24
                I need a LIFE!!
                • May 2008
                • 14849

                Ever wonder why most brand new guns come with spent shells? Some states require that 1 spent case and bullet go into the state's database. Yes it's very easy to tell what kind of gun fired the bullet. Guns leave "finger prints" on the bullets and casings. With all of the criminal cases that have been run through the F.B.I. and various L.E.A. around the country they have a wealth of info to cross check.

                As for changing calibers or barrels...........why would anyone do that?


                Did you know the F.B.I. has a database for just about every style and type of shoe and boot sole that is sold in North America.
                Last edited by SJgunguy24; 12-25-2008, 3:32 PM.
                There are 3 kinds of people in this world.
                The wise, learn from the mistakes of others.
                The smart, learn from their own mistakes.
                The others, well......they just never learn.

                "Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, almighty God! I know not what course others may take; but as for me, Give Me Liberty, Or Give Me Death!"
                Patrick Henry.

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                • #9
                  user5412
                  Senior Member
                  • Nov 2007
                  • 565

                  Change the barrel, ejector, and give the firing pin hole area a good scrub with wool, and wha-la, you have a "new" gun.

                  Those programs where they sent a fired bullet and shell have proved useless in identifying a gun. Only a small percentage of crimes are solved using the database. In fact, in some states they want to get rid of it because it has proved useless and enormously expensive.

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                  • #10
                    Seesm
                    Calguns Addict
                    • Nov 2008
                    • 7812

                    Originally posted by user5412
                    Change the barrel, ejector, and give the firing pin hole area a good scrub with wool, and wha-la, you have a "new" gun.

                    Those programs where they sent a fired bullet and shell have proved useless in identifying a gun. Only a small percentage of crimes are solved using the database. In fact, in some states they want to get rid of it because it has proved useless and enormously expensive.
                    Here here.... SO ...seriously is the spent shell in my .40 Springfields case really in some data base?

                    Hhhmm I thought it was just a factory "test" shot?

                    ...Yes no maybe?

                    Comment

                    • #11
                      CSDGuy
                      Veteran Member
                      • Mar 2007
                      • 3763

                      Originally posted by user5412
                      Change the barrel, ejector, and give the firing pin hole area a good scrub with wool, and wha-la, you have a "new" gun.

                      Those programs where they sent a fired bullet and shell have proved useless in identifying a gun. Only a small percentage of crimes are solved using the database. In fact, in some states they want to get rid of it because it has proved useless and enormously expensive.
                      My understanding of the ballistic fingerprinting programs in the other (2) states that have it, is that it has helped solve only 1 crime... and that could/would have been solved without that specific evidence generated by the ballistic fingerprinting program anyway. I think it was/is the Maryland State Police that wants to get rid of the program...

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                      • #12
                        trinydex
                        Veteran Member
                        • Feb 2008
                        • 4720

                        Originally posted by JHC
                        What if the bullet came from a rifle that had started life as a different caliber but had been rebarreled in something else (Yugo M48 sporterized into .308)? Might throw them for a loop.
                        i would guess this ends up making it easier to identify the gun though.... such a combination would be more rare than some off the shelf configuration.

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                        • #13
                          CSDGuy
                          Veteran Member
                          • Mar 2007
                          • 3763

                          Knowing certain details about a bullet and casing may lead an investigator towards a certain type of firearm, and possibly a specific brand/model of firearm. Beyond that, they'd be doing the normal stuff they'd have to do anyway, so if they ever find the weapon, they'd be able to compare from that...

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                          • #14
                            Axewound
                            Senior Member
                            • Apr 2008
                            • 1260

                            its extremely hard, they usually put that shell casing or recovered bullet into NIBIS.

                            they never say we have a "match" but rather they have similar charactersitics
                            Peace through superior firepower.

                            liberals want my guns and conservatives want my porn, im not willing to part with either

                            A man is a man his whole life, a woman is a woman until she becomes your wife.
                            -Al Bundy

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                            • #15
                              BaronW
                              Senior Member
                              • Apr 2007
                              • 989

                              I imagine they can say if a given gun is the source of a given projectile and casing. Working back from bullet to gun I can only see them saying "this rifling profile is consistent with a glock polygonally-rifled barrel" or what have you.
                              I am not a lawyer, the above does not constitute legal advice.

                              WTB: Savage 99 SN#507612 (buying back grandpa's rifle)

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