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Author Topic: Mag Primer vs standard .223  (Read 1684 times)

Offline mcxring

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Mag Primer vs standard .223
« on: 08:14 AM, 07/30/12 »
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  •   I am new to reloading, I have been using cci400 and br-4 in my Ar-15 .223, i am all about accurcy, I have read talk about using the cci450 mag. primers, also the wolf primers, are these a better choice? I also now will be reloading .308 (AR-10).   
                                                                         Mike
                                                                 


                                           


    Offline markm87

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    Mag Primer vs standard .223
    « Reply #1 on: 08:21 AM, 07/30/12 »
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  • Take your favorite load and run a primer test with 4 or more kinds of primer.  We did this and the results were stunning.  Primers make a HUGE difference.

    Our load liked WOLF SRMs best.  CCI BR primers wouldn't even hold MOA.  It was a real eye openner to see how big of an impact primers can be on a load.

    Offline 243winxb

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    Mag Primer vs standard .223
    « Reply #2 on: 08:30 AM, 07/30/12 »
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  • The CCI400 seems to be soft and thin when compared to the Rem 7 1/2. Not good for an AR15. Do NOT use Rem. 6 1/2 primers.


    Offline fr3db3ar

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    Mag Primer vs standard .223
    « Reply #3 on: 09:48 AM, 07/30/12 »
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  • That being said.  All I run through my R15 is CCI400 (hundreds of rounds).  No misfires or piercings.
    Molon Labe, Aim small, miss small, When they come for your guns, give them the ammo first
    I have no wish to battle anyone.  Let not desire be confused with ability.

    Offline Bradley Walker

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    Mag Primer vs standard .223
    « Reply #4 on: 10:56 AM, 07/30/12 »
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  • That being said.  All I run through my R15 is CCI400 (hundreds of rounds).  No misfires or piercings.

    I can only use CCI 400s for light bullet loads.  Heavy bullet loads will pierce in the heat.

    Offline fr3db3ar

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    Mag Primer vs standard .223
    « Reply #5 on: 11:54 AM, 07/30/12 »
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  • Quite possible that you are correct.  The heaviest I can shoot accurately is 69.
    Molon Labe, Aim small, miss small, When they come for your guns, give them the ammo first
    I have no wish to battle anyone.  Let not desire be confused with ability.


    Offline Bradley Walker

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    Mag Primer vs standard .223
    « Reply #6 on: 12:32 PM, 07/30/12 »
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  • Quite possible that you are correct.  The heaviest I can shoot accurately is 69.

    You want a thick cupped primer for high pressure loads.  CCI 400s were not designed for the pressures of a 223, actually.

    Offline mcxring

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    Mag Primer vs standard .223
    « Reply #7 on: 03:00 PM, 07/30/12 »
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  • What does pierce in the heat mean??   

    Offline Bradley Walker

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    Mag Primer vs standard .223
    « Reply #8 on: 09:09 AM, 07/31/12 »
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  • What does pierce in the heat mean??   

    The primer will be pierced by the firing pin and blow up in you face and inside your gun.

    Happens worse when it is hot.

    Offline Beau

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    Mag Primer vs standard .223
    « Reply #9 on: 09:45 AM, 07/31/12 »
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  •   I am new to reloading, I have been using cci400 and br-4 in my Ar-15 .223, i am all about accurcy, I have read talk about using the cci450 mag. primers, also the wolf primers, are these a better choice?
    I used thousands of CCI400s in an AR without any problems.  Softer than 450s or 7 1/2s? Yes, but not everything has to be run flat out. I believe I only backed off about 50fps from harder primers.

    As far as 450s vs. Wolf vs. BR4 vs whatever....you will just have to test. It's all about lot numbers. You either have a good batch of primers or you don't. Wolf makes good primers and you *might* have a better chance of getting a good lot of them, but it isn't a sure thing. I've run 2 lots of them head to head with Remington 7 1/2 and CCI450 and there wasn't a dimes worth of difference between any of them.

    Offline CanusLatransSnpr

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    Mag Primer vs standard .223
    « Reply #10 on: 09:55 AM, 07/31/12 »
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  • I've heard and read lots of different stuff about using different primers and yes, with higher pressure loads the thicker cup primers are better but, you're giving yourself a false sense of security.  A hot load is a hot load!  I was talking to a rifle builder one day, which shoots competition too, and I asked him what primer he prefers and he said "any of them, whatever lights the fire!"  Different info from different sources!

    Mike
    The only people that don't make mistakes are those that don't do anything!

    Offline markm87

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    Mag Primer vs standard .223
    « Reply #11 on: 10:18 AM, 07/31/12 »
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  • The primer will be pierced by the firing pin and blow up in you face and inside your gun.

    Happens worse when it is hot.

    What?  I've seen lots of primer piercings over the years.  I've never seen any "blow up" in a gun or a guy's face.

    You'll end up damaging your firing pin, and continued piercings from a damaged firing pin can etch and ruin your bolt face.  But if you're not paying attention, you'll never notice that it's happening.

    Offline 243winxb

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    Mag Primer vs standard .223
    « Reply #12 on: 11:47 AM, 07/31/12 »
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  • My post above is from personal experence. The CCI 400 started to flow into the firing pin hole, mid-range loads, Savage bolt action.  Changing to Rem. 7 1/2 , same power charge, no flow. Yes, pressure may have been different from changing primers. Some good reading on primers>    http://www.shootingtimes.com/2011/01/04/ammunition_st_mamotaip_200909/   And primer cup thickness > http://www.jamescalhoon.com/primers_and_pressure.php   Internet info, take it for what its worth. Only way to know is, do your own testing.    :)

    Offline mcxring

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    Mag Primer vs standard .223
    « Reply #13 on: 01:24 PM, 08/04/12 »
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  • really Great article on primers   thnx


     

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