Blackhorn 209 blowback

Discussion in 'Muzzleloader Hunting' started by Blackpowder72, Jun 3, 2018.

  1. Blackpowder72

    Blackpowder72 Active Member

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    I made the switch to BH 209. I'm having serious trouble with blowback in the primer , breech plug. The primer is solid black and I have to pull it out with pliers. I'm shooting a CVA Accura MR , 110 gr powder , Barnes T ez , and Federal 209 A primers ( witch BH recommend ) . Also bought the new BH CVA breech plug . I assume switching primers wI'll fix this problem? Going to try to find some CCI and Winchester.
     
  2. Md reloader

    Md reloader Well-Known Member

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    I use the same 110gr. with 300 gr. SSTs and CCI209M and have no problems in my CVA. I also use the BH breech plug .
     
  3. ENCORE

    ENCORE Well-Known Member

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    You can try the CCI209M primer, or the WIN209 primer which is the longest of the primers. One other method is to shim out the firing pin to get more crush on the primer. Check with CVA about the blow back problems. I think they have shim kits they'll send you.
     
  4. Bigeclipse

    Bigeclipse Well-Known Member

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    interesting. I was getting stuck primers after switching to BH209 as well but not after just one shot so I simply shoot and then swab the primer hole after each shot. seems to work. I never heard of these shims...where do they go?
     
  5. ENCORE

    ENCORE Well-Known Member

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    I'm not a CVA shooter, that said, its my understanding that they go behind the firing pin.
     
  6. 26Reload

    26Reload Well-Known Member

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    I am not a mzldr expert...but I believe the shim for the CVA is an o-ring placed in front of the primer....
    If you look on the modernmuzzleloader site they have sticky's for simple things like that...and of course if you search the forum there it is bound to pop up....
     
  7. joel1952

    joel1952 Member

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    the o ring is what CVA recommended to me, and it stopped the blow by
     
  8. ENCORE

    ENCORE Well-Known Member

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    Actually, the guys on M-M were the ones that started the "O" ring. If you check with some of those guys, they'll tell you also how to shim.
     
    26Reload likes this.
  9. 26Reload

    26Reload Well-Known Member

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    I have two knight Ultralites....both shimmed with metal shims...
    I know a lot of the guys talk about the orings for cvas...dont recall if any used the metal shims in cvas....
     
    Last edited: Jun 4, 2018
  10. ENCORE

    ENCORE Well-Known Member

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    Its a shame that with just about everything made today, something has to be modified for the muzzleloader to function properly. :(
     
  11. Blackpowder72

    Blackpowder72 Active Member

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    Thanks for the info. I picked up some Some Winchester primers today I will give those a try .
     
  12. pooldoc

    pooldoc Well-Known Member

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    I experienced similar problems with my Knight Disc Extremes when I installed their bare primer breech plugs and used heavy loads of BH209. At the time I was using CCI 209M primers. Switching to the regular Winchester 209 Primers (not the ones made for Muzzleloaders) helped but did not eliminate the problem. I used the info from the Modern Muzzleloader blog and ordered the stainless steel shims and installed them as directed. That has solved the problem. My total cost was about $25. There are several very competent folks that can do the job for you as well. The shims are installed in the primer pocket on the Knights. Not familiar with other makes.
     
  13. Peddler 76

    Peddler 76 Well-Known Member

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    I use CCI 209M, no problems at all. I shoot a TC G2 Contender .45.