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CCI BR2 primers

Discussion in 'Competition Shooting' started by badnova, Jun 13, 2011.

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  1. badnova

    badnova Member

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    Does anyone have info on the hardness of CCI BR2 primer cups compared to Winchester, Federal, Remington, etc?
    I am seeing slight primer cup cratering with middle of the road loads in my LAR8 .308
    Thanks
     
  2. bds
    • Contributing Member

    bds Member

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  3. badnova

    badnova Member

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    Thank you very much for the info
     
  4. jnfphd

    jnfphd Member

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    Primer Hardness

    Good link below that provides a list of specific primers and "brisance" / hardness. CCI BR2 are considered "mild brisance".

    http://www.sksboards.com/smf/index.php?topic=56422.0

    In case the thread link dissappears:

    -------------------------------------
    -------------------------------------

    PRIMER CHART & REFERENCE GUIDE

    Small Handgun Standard .017" cup thickness

    CCI 500
    Federal 100 - Has a soft cup - good to use if hammer strike is light.
    Federal 100M - Match version of above
    Magtech PR-SP
    Magtech PR-SPC - Lead-free "Clean Range" primer for indoor ranges etc.
    Remington 1 ½
    RWS 4031
    Winchester WSP
    Wolf Small Pistol SP - brass cup

    Small Handgun Magnum .017" cup thickness

    CCI 550 See Note 1 at the bottom of page
    Federal 200
    Federal 200M - Match version of above
    Magtech PR-SPM
    Remington 5 ½
    RWS 4047
    Winchester WSPM
    Wolf Small Pistol Magnum SPM - brass cup

    Large Handgun Standard .020" cup thickness

    CCI 300
    Federal 150 - Has a thinner cup
    Magtech PR-LP
    Remington 2 ½
    RWS 5337
    Winchester WLP
    Wolf Large Pistol LP - brass cup

    Large Handgun Magnum .020" cup thickness

    CCI 350
    Federal 155
    Wolf Large Pistol Magnum LPM - brass cup

    Small Rifle Standard

    CCI 400 -thin .020" cup, not recommended for AR15 use by CCI/Speer. Good for .22 Hornet, .30 Carbine. See Note 1 at the bottom of the page
    CCI BR4 - match primer with a thicker .025" cup.
    Federal 205 - Mil-Spec cup thickness according to Federal - okay for 5.56mm. .0225" cup thickness.
    Federal 205M - same as the 205 but the match version.
    Magtech PR-SR - .025" cup thickness (not much feedback yet on this new primer as to AR15 suitability but with the same cup thickness as the Rem 7 1/2 it looks good so far)
    Remington 6 ½ - thin .020" cup, intended for older, lower pressure rounds Remington says do not use for the .223 Rem or other similar pressure rounds. Good for .22 Hornet, .30 Carbine.
    Remington 7 ½ BR - A match or "bench rest" primer. Lyman & Nosler classify this primer as a Standard. Remington says the compound is the same as the 6 1/2 but with a thicker .025" cup.
    RWS 4033
    Winchester WSR - some piercing issues noted when changed from silver to brass cup. Cup thickness is a bit thinner at .021". Most say they are good to go for the AR15 despite that, probably because of the hardness of the cup. Some feel they are less resistant to higher pressures.
    Wolf Small Rifle SR - soft, sensitive copper cup, not recommended for AR15/military rifle use or high pressure rounds.

    Small Rifle Magnum

    CCI 450 - same thicker .025" cup as the BR4 and #41.
    CCI #41 - commercial version of the fully-qualified DOD primer for use in U.S. military ammo. With this primer there is more 'distance' between the tip of the anvil and the bottom of the cup than with other CCI SR primers. .025" thick cup. Same primer mix as CCI 450.
    Remington 7 ½ BR - A match or "bench rest" primer. Hornady, Handloads.com, and Chuck Hawks classify this primer as a Magnum, differing from other sources that classify it as a Standard. .025" cup thickness.
    Wolf Small Rifle Magnum SRM - hard, less sensitive brass cup intended for AR15/military rifle and high pressure rounds.
    Wolf Small Rifle 223 SR223 - "This is the newest primer available in the Wolf line. It is ever so slightly hotter than the small rifle magnum primer and it comes with a brass colored thick cup. This primer can be used in place of the SRM primer or used when a different powder is used that is hard to ignite."

    Large Rifle Standard

    CCI 200 - mild in brisance. Hard enough for use in semi-automatics.
    CCI BR2 - same as the 200 but the match version. Hard enough for use in semi-automatics.
    Federal 210 - medium brisance between CCI/Remington & Winchester. Do not use in semi-automatics.
    Federal 210M - match version of the above primer. Do not use in semi-automatics.
    Magtech PR-LR
    Remington 9 ½ - mild in brisance.
    RWS 5341
    Winchester WLR - the hottest standard primer. Hard enough for use in semi-automatics.
    Wolf Large Rifle LR - all brass - Used by noted match shooter David Tubbs who says: "Be sure they are seated into the case - if not they can be hard to ignite. Russian primers use a different sinoxide compound (closer to the European type), which, in my testing, consistently delivers better extreme spreads over Federal..." Hard enough for use in semi-automatics.

    Large Rifle Magnum

    CCI 250
    CCI #34 - commercial version of the fully-qualified DOD primer for use in U.S. military ammo.
    Federal 215 - original magnum primer
    Remington 9 ½ M - mildest magnum primer.
    RWS 5333
    Winchester WLRM
    Wolf Large Rifle Magnum LRM - all brass

    50 BMG

    CCI #35 - commercial version of the fully-qualified DOD primer for use in U.S. military ammo.
    Winchester 8312

    Primers recommended for use in .223 Rem/5.56 semiautomatic rifle loads:

    CCI #41, 450, BR4 (#41 & 450 good with ball powder)
    Federal 205, 205M
    Remington 7 1/2 BR (good with ball powder)
    Winchester WSR (good with ball powder)
    Wolf SRM (good with ball powder)
    Wolf SR223 (hotter than SRM - great with ball powder)

    Primers recommended for use in .308 Win/7.62x51/7.62x39 semiautomatic rifle loads:

    CCI #34, 200, BR2, CCI 250
    Winchester WLR, WLRM (good with ball powder)
    Wolf LR

    ##################################################################################

    NOTE 1: According to Speer/CCI Technical Services - Both the CCI 550 Small Pistol Magnum and CCI 400 Small Rifle primers are identical in size. Both primers use the same cup metal and share the same cup thickness. Both primers use the same primer compound formula and same amount of primer compound. They can be used interchangeably.
     
  5. Steve in NC

    Steve in NC Member

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    Location:
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    badnova,
    Keep in mind that primer cup hardness isn't the only possible problem. If there is too much slop around the firing pin in the bolt face you can very easily get primer cratering that is a false positive for pressure signs. When in essense all you have is an improperly supported primer with pressure against it on one side and no steel supporting it on the back side.
    This could be because of a different issue also. Do you use a flashhole deburring tool and open up the flash hole too much allowing more pressure back into the primer cup area? Not a big difference but it does make a difference depending on the case and how big you make the flash hole.
    Just some other things to consider rather than simply switching primers until the cratering goes away.

    I have several bolt guns that I had a bushing installed into the bolt face to tighten up the slip fit of the firing pin and firing pin hole just for this very reason. It helps cut down on the chances of piercing a primer and getting blow back into your face and eyes.

    Steve
     
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