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CCI Brench Rest and Standard SR Primers

Discussion in 'Handloading and Reloading' started by Historian, Dec 19, 2009.

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  1. Historian

    Historian Member

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    Can someone tell me the difference between CCI Brench Rest SR primers and their standard SR primers? Does one have an advantage over the other?

    Historian
     
  2. rcmodel

    rcmodel Member in memoriam

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    Benchrest primers are supposedly held to higher manufacturing standards / tolerances then normal primers.

    They are intended to provide more consistently uniform ignition from shot to shot for better accuracy.
    And they probably do.

    rc
     
  3. Historian

    Historian Member

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    Thanks RC. I just picked up 1K by mistake. Glad I didn't goof up. I knew I could count on you to have the answer.

    Historian
     
  4. R.W.Dale

    R.W.Dale Member

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    I've used both in my bench gun and to be honest I've never been able to tell a diffrence in accuracy
     
  5. JimKirk

    JimKirk Member

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    BR primers are said to have thicker cup material and are safe to us in AR type gun with out fear of Slam fires. I have not measured the thickness, but it seem to be the consensus. I am using CCI BR in my AR right now because that is all I could find at the time. Seems primers are getting more plentiful. Powder Valley has CCI # 41 in stock just a few minutes ago, web site may not be up to date

    Jimmy K

    Do a google search on primer cup thickness, you'll find several pieces about primer cup thickness. Of the measurements that were tested the BR came up thicker by .002. Like I said I did not do the test, only read about them. Add a half cup of salt and ....
     
    Last edited: Dec 20, 2009
  6. rcmodel

    rcmodel Member in memoriam

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    By all accounts, CCI uses the same .025" primer cup thickness on the standard & BR primers it makes.

    As for AR's and standard primers and perforated cups?
    That is not a concern with any standard SR primer and the AR-15.

    What is a concern is softer or more sensitive primers that may cause a slam-fire in a semi-auto rifle.

    CCI makes mil-spec #34 LR and #41 SR primers that are harder & less sensitive then standard or BR primers.

    rc
     
  7. 45ACPUSER

    45ACPUSER Member

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  8. EddieNFL

    EddieNFL member

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    Scrolled down, but didn't see anything primer related.
     
  9. Black_Talon

    Black_Talon Member

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  10. Strongbad

    Strongbad Member

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    The thicker cups are used on the CCI mil-spec primers. The cups on the standard primers, BR or not are the same. Per CCI they basically do a production run with their most consistent operators on the most consistent machines and those are the BR primers.
     
  11. P-32

    P-32 Member

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    I like the Remington 7 1/2's but see no real difference between those and the CCI BR primers.
     
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