How to prime a 22 LR Case -- Anatomy of a 22LR Cartridge - Page 2 - RimfireCentral.com Forums

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  #16  
Old 03-28-2015, 09:27 AM
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Quote:
Originally Posted by Sav99age View Post
Kitsap, thanks for posting.

In the first photo, what is the crud in the bottom of the Eley Sport case? Is that priming compound?
That is what it appeared to be. Inside this was the ugliest one that was opened.

DougF
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  #17  
Old 04-02-2016, 08:36 PM
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Thumbs up Thank you for the info.

Fascinating!

Thank you for the pictures and the additional information.

I agree with the "Do not try this at home" advice.
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  #18  
Old 07-28-2016, 03:54 AM
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This is a dude that has a lot of free time on his hands!!!! I wish I had that kind of free time. I'd be a killin machine!!!
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  #19  
Old 06-03-2017, 03:05 AM
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Thank you for sharing (beautiful meticulous work). Now if someone could definitively interpret the results (I'm sure we can all guess, but there must be some scientific explanation as to why these cartridges all work but differently). Some of the "primers" appear uniform and powder (how did they stay intact while opening the case?) while others appear almost like they were applied as a liquid or a coating of some sort.


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  #20  
Old 10-07-2017, 03:36 AM
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Excellent post, one of the most informative I have seen on RFC.....well done kitsap
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  #21  
Old 01-20-2018, 12:31 AM
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This reminds me a lot of "The Bullets Flight", by Franklin Mann.

An extraordinary amount of information collected in an extremely painstaking manner.

Good on ya
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  #22  
Old 03-03-2018, 04:42 PM
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I believe there is a How It's Made episode on 22 LR ammo which was very entertaining
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  #23  
Old 03-30-2018, 01:24 AM
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Quote:
Originally Posted by BWstickman View Post
This is a dude that has a lot of free time on his hands!!!! I wish I had that kind of free time. I'd be a killin machine!!!
I would bet that is not the "case" here -no pun intended-

Have you ever heard the expression "If you need something done - ask someone who is busy" Often those who are willing to tackle projects that are tedious and time consuming are juggling many projects and thrive on getting things done.

Thanks Kitsap for your hard work and one of the best / most interesting posts I have read in a long time.
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  #24  
Old 06-19-2020, 07:34 AM
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Quote:
Originally Posted by kitsap View Post
Here are the rest of the photographs.

DougF





Bump to enlighten the RFC masses.
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  #25  
Old 06-19-2020, 07:55 AM
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Anatomy of a 22LR Cartridge

Thanks Al. Good timing. Nice cross section of the rim area. Fits well with the firing pin shaping several are doing.

Had no idea some rounds use so much case volume for primer.
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  #26  
Old 07-16-2020, 08:25 AM
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Thumbs up Awesome post

Very interesting. To my untrained eye the pics reinforce the "you get what you pay for" adage.
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  #27  
Old 02-19-2021, 09:11 PM
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Copper Crusher Method to ensure proper ignition of pictured primers.

https://www.coxmanufacturing.com/%%%...y-2017-Cox.pdf

Copper-Crusher Function #2: Rimfire Firing-Pin Indentation
The second variation of the copper-crusher measuring system
is used to measure firing-pin strike force. The firing-pin
mechanism consists of some variation of either a spring-powered
firing pin (striker) or a hammer that, upon pulling the trigger,
is released to strike the firing pin, which then strikes the
rim of the cartridge. This, in turn, initiates the primer that
instantaneously ignites the powder and fires the round.
In order to ensure consistent firing-pin design, it is necessary
to quantify the force with which the pin impacts the rim of the
cartridge. This allows firearms manufacturers to ensure and
demonstrate that their product meets a known industry standard
in regard to firing-pin design. A uniquely configured coppercrusher
system serves this purpose.
The copper crusher measures firing-pin load pressure using
a solid bar machined of high-purity copper, from which the
mini copper bars are sliced and machined to the exact size
and shape of the many rimfire cartridge designs (e.g., short,
long rifle, magnum). A single copper indent crusher is placed
in the firing chamber of a firearm and the trigger is pulled,
causing the firing pin to strike and leave an indent mark on
the rim area of the copper crusher. The copper crusher is
then removed and the indentation measured (Fig. 6). The
indentation must measure 0.014 inch (read to the nearest
0.0005 inch) with only a 0.001-inch variation to indicate a
passing indentation test.
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  #28  
Old 06-06-2021, 05:48 AM
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Very well done and an interesting look inside of the various 22's. Thanks
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