Spent Casing with new firearms?

I just got one of these casings with my new MKIII, and if anyone is interested, I would be happy to put it under the microscope, take a few pics, and post so we can verify what the scoop is with actual encodings in the mark left by the pin.

EDIT: ah crap, old post. Sorry for the resurrection.
 
Old thread or not I would be interested to know if there is some microscopic ID on the firing pin
I have a Norinco T-33 clone in 9mm and noticed that every spent casing has a reverse copy of the rough machine marks on the breach face due to the recoil pressing the cases hard against it.
 
Skinny 1950 said:
Old thread or not I would be interested to know if there is some microscopic ID on the firing pin
I have a Norinco T-33 clone in 9mm and noticed that every spent casing has a reverse copy of the rough machine marks on the breach face due to the recoil pressing the cases hard against it.
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That's what they're actually collecting them for - tool marks on the breach face being transferred to the case head - that micro printing stuff doesn't work and never has been implemented. The only people who believe it does work are Handgun Control, and people who cash cheques written by Bloomberg.
 
Supposedly the spent casings are more useful as far as identifying the gun that was used in a crime than the recovered bullets are. It would be interesting to find out how true this is.
Kristian
 
Guns are just like any other tool. As they are used they wear and each possesses its own unique characteristics that leave equally unique marks on spent casings and projectiles. Problem with projectiles is they are often deformed upon impact which can make comparison to a known sample difficult.

Spent casings recovered at a scene are typically undamaged and the unique characteristics left by the firearm clear. The trick is getting the firearm as soon as possible after the shooting to make the comparison as the marks left on casings can change over time as more rounds are fired and more wear occurs to the moving parts. Same holds true for footwear impressions, tire impressions or any other impression left by a manufactured product.
 
TDC said:
The firing pin extractor ejector and breach face all leave unique marks. If you want a new "fingerprint" for your brass you'll need a new slide. And obviously a new barrel or go at the original with a file.

Tdc
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Or just use a revolver for your nefarious deeds. Or you just pick up your brass. Dumbest idea I've heard from the antis. Millions of dollars spent and it can all be foiled by tidiness.
 
Redbearded1 said:
Or just use a revolver for your nefarious deeds. Or you just pick up your brass. Dumbest idea I've heard from the antis. Millions of dollars spent and it can all be foiled by tidiness.
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polishing, re-surfacing or scratching the breach face after said nefariosity would do equally well

wow - I just used "nefariosity" in a sentence
 
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turbo_bird said:
Supposedly the spent casings are more useful as far as identifying the gun that was used in a crime than the recovered bullets are. It would be interesting to find out how true this is.
Kristian
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New York and Maryland both have legislated "ballistic fingerprinting". Last I read about a year ago they had spent about $10 million implementing it and at last count it had contributed to solving ONE crime. Almost makes the long gun registry sound like a bargain.

Living proof that no scheme is too stupid for the antis to try.
 
Besides the fact that it seems no law enforcement agency has the computer- or man- power to dedicate to tracking, collecting, scanning, inputting, cataloguing…

I know what *I* would do if my jurisdiction required people to submit fired cases. Forget switching firing pins and polishing surfaces; I'd just pick up another spent casing from the range, and send in that one instead. QED.
 
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