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Large Rifle Primers vs. CCI 34

Discussion in 'Handloading and Reloading' started by Win1892, Mar 29, 2010.

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  1. Win1892

    Win1892 Member

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    Anybody see a reason not to use #34 CCI primers in place of Large Rifle?
     
  2. JimKirk

    JimKirk Member

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    They will work in most guns without any problems. If your gun has a weak firing pin spring or some other reason that would cause a lighter strike, then you may have problems but otherwise they will work.

    Jimmy K
     
  3. ArchAngelCD

    ArchAngelCD Member

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    I agree, if you rifle is in good operating condition I see no reason not to use the CCI #34 primers.
     
  4. Peter M. Eick

    Peter M. Eick Member

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    The c-34 is a MAGNUM primer. Adjust accordingly.
     
  5. Slamfire

    Slamfire Member

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    Not as magnum as WLR. CCI#34’s are excellent primers. I have won, placed, or received awards points using the CCI#34 in my match rifles. Won an XTC match last week with them.

    Firearms with weak ignition systems, worn out mainsprings, insufficient firing pin strike or protrusion, may experience problems with mil spec primers.


    Code:
    [SIZE="3"]M98 26"  1-10 Wilson Barrel
    
    
    168 gr Sierra Match 47.0 AA2495 wtd R-P cases [B]CCI 34[/B] OAL 3.30"	5 May 00
    							T=82°F
    							
    Ave Vel =	2720						
    Std Dev =	4						
    ES =	12						
    Low =	2713						
    High =	2725						
    N =	10						
    							
    							
    168 gr Sierra Match 47.5 AA2495 wtd R-P cases [B]CCI 34 [/B]OAL 3.30"	5 May 00
    							T=82°F
    							
    Ave Vel =	2745						
    Std Dev =	9						
    ES =	28						
    Low =	2728						
    High =	2756						
    N =	10						
    							
    168 gr Sierra Match 47.0 AA2495 wtd F-C cases [B]WLR [/B] OAL 3.30"	5 May 00
    							T=82°F
    							
    Ave Vel =	2765						
    Std Dev =	10						
    ES =	30						
    Low =	2745						
    High =	2775						
    N =	11[/SIZE]
     
  6. Peter M. Eick

    Peter M. Eick Member

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    Agreed. It is not a "hot" magnum but you still have to act accordingly.

    I shoot a lot of c-34's out of my M1A's and always found them accurate with IMR-4895 and 168 Sierra's.
     
  7. MRH

    MRH Member

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    They are much harder than standard LR primers, and as such

    As noted by SlamFire:
    Firearms with weak ignition systems, worn out mainsprings, insufficient firing pin strike or protrusion, may experience problems with mil spec primers.

    However, the only way I can keep my SKS from slam fires is to use the #34s.

    As with any component change, work up the load.
     
  8. frankge

    frankge Member

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    I was looking for 34's due to reports of slam fire conditions in military rifles. I reloaded with Winchester LR for my 7.62x39 in my AK and never got a single slam fire. I still wanted to use 34's but could not find any avaialble. I ordered 5000 Wolf LRs because it was reported that they were a little "harder" than standard US made primers. But that was internet research so I take it with a grain of salt.
     
  9. aka108

    aka108 Member

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    The 34 were most likely made for use with the SKS's and AK's or other arms with the free floating firing pins. Harder to help prevent slam fires.
     
  10. cheygriz

    cheygriz Member

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    The #34 is their MilSpec primer.

    Remington 7 1/2 SM and 9 1/2 LR are also MilSpec, and available "off the shelf."
     
  11. ScratchnDent

    ScratchnDent Member

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    Wow, really?

    It bums me out to hear that I've been paying more for #34s and having them shipped to me when I had 9 1/2s already sitting on my bench!
     
  12. cheygriz

    cheygriz Member

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    When I got my first SKS, I was having 2-3 slamfires with every magazine of reloads, and factory PMC "sporting" ammo. (The only 7.62X39 available at that time)

    I wrote to the NRA, and they told me that the Remingtons were Milspec. I switched to Remingtons, and haven't had a poroblem since. That was more than 25 years ago.

    I've used nothing but Remington primers for the last 25+ years.
     
  13. P-32

    P-32 Member

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    Just so you know, the M-1, M-14 and M-16 and their clones all have free floating firing pins. I understand the 34's have a different anvil angle than the "regular" primers.
     
  14. Slamfire

    Slamfire Member

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    They might have a different primer composition.

    The CCI#41's have a thicker cup than WSR. I stopped using the brass colored WSR due to all the firing pins that got dished when they pierced. Same loads don't bother a CCI primer at all.
     
  15. cheygriz

    cheygriz Member

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    And they won't bother the thicker cup of a Remington.
     
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