newly released BERGER 184 Hybrid (.284)... preliminary load data and results compared to 180 Hybrid

Discussion in 'Big Stuff -- 6.5mm, 7mm, 30 Cal' started by MontanaCreedmoor, Jul 14, 2018.

  1. MontanaCreedmoor

    MontanaCreedmoor

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    GONZOS: excellent info.. thank you.
    How is your accuracy with your 0.220 Freebore ... compared to the 180’s?? And what velocity are you running on the 184’s?
     
  2. Gonzos

    Gonzos Gold $$ Contributor

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    My accuracy has been outstanding with the .220 freebore in both bullets. For the 184's I did a seating depth test and .005 off shot the best with .030 off the second best. I'm running 51.1 of H4350 and getting 2820 fps. out of a 32" barrel and no pressure signs.
     
  3. Mulligan

    Mulligan Gold $$ Contributor

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    No question on the accuracy of your rig.
    Nice shooting in WY!
    CW
     
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  4. MontanaCreedmoor

    MontanaCreedmoor

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    6_5_284: have you got the 184’s through the new barrel yet? Any interesting results?
     
  5. kvd

    kvd Silver $$ Contributor

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    Have there been any efforts at load development with IMR 7828ssc or Hodgdon H1000 - especially for 7 SAUM?
     
  6. gilmillan1

    gilmillan1 Silver $$ Contributor

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    Forget IMR 7828ssc, no one in their right mind would take that powder to a big match. Unless you know how to adjust your load based on weather conditions. It will shoot great one day, and then like crap on the following. As for H1000, it may shoot well, but most use a bit faster powder.
     
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  7. 6_5_284

    6_5_284

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    NO, I HAVE NOT. SEEMS LIKE I HAVE TOO MANY "IRONS IN THE FIRE" LATELY. WILL TRY TO DO SOME TESTING WITHIN THE NEXT MONTH IF MY "HONEY DO LIST" GETS CAUGHT UP.
     
  8. RampedRaptor

    RampedRaptor Silver $$ Contributor

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    How come you changed from .6 to .5gr intervals ?
     
  9. 100FUEGOS

    100FUEGOS

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    The same situation that I get with the RS70.
    One day with 57.2 I get 880 ms with 23º and two weeks later with 30º I get 905 ms ...
     
  10. 100FUEGOS

    100FUEGOS

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    That same situation of temperatures and load, has been given to me. With a speed in 30º of 915 m / s. That gunpowder is crazy. Ruin my competition by leaving the ammunition in the sun, in the last entry.

    And I have annoyed 30 brass
     
  11. Tito_Lozada

    Tito_Lozada

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    Hello,

    After reading this post and following for a few months I decided to build a 7mm .284 WIN rifle. As right now I sent 2 dummy rounds (3.305 COAL/2.256 OAL) for a reamer to be manufactured by Manson. All the other parts will come from different sources: Brux Barrel 1-9", Action (Brand not decided yet), scope, trigger, etc. Hopefully I can put it together and report back the findings with some of the loads suggested here. Thanks to the ones who did the hard work for me! :D

    I will custom machine my stock like I did with my Remington 700.
     
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  12. MontanaCreedmoor

    MontanaCreedmoor

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    TITO:

    What freebore is MANSON coming back with and suggesting?
     
  13. Tito_Lozada

    Tito_Lozada

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    Just sent them the samples (2) and they came with .210" and .319" diameter in the neck diameter. (I asked for .316"). My samples messured 3.305" COAL/2.555" to the ogive. I have to give them a call and see why the neck diameter was increased .003". As far as the freebore I have no clue of why they went with .210". Maybe that's based from the dummies but in the case I need to let them know that will be the shortest I will run my rounds. That measurement puts me about a 1/16" above the doughnuts. I might asked them to increase that freebore another .025" - .040" (.235-.250 freebore) to have room to play with the seating and other bullets (195gr). I call Monday and we'll see what they say.
     
  14. Rushty

    Rushty Gold $$ Contributor

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    If your going a no turn neck the .316” may not be enough, I had mine done originally at .316 and I couldn’t run a bullet into the brass after firing in unsized brass, so opened it up. When I ordered my own reamer from PTG I they sent a .319” which is working well so far, they also sent me a fb of .208” for the Hybrids, so far I’ve got about .020” jump and still above the donut..
     
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  15. 1shot

    1shot Site $$ Sponsor

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    My Shehane reamer FB is either.220 or .225 and I had the chamber throated a bit more to put 183 Sierra pills in front of the donut.
    I hope this helps,

    Lloyd
     
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  16. Tito_Lozada

    Tito_Lozada

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    After calling Mr. Manson and discussing the idea of been able to shoot up to .195gr Bergers he suggested a freebore inbetween of .250-.265" that way I can go back and forth with both bullet weights.
     
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  17. MontanaCreedmoor

    MontanaCreedmoor

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    TITO: Thanks. Makes sense.
    I’m currently running a .235” freebore with the 184 hybrids. Seating comfortably in front of the “donut” area .... with a modest jump to the lands.

    Thanks for the info!
     
  18. rardoin

    rardoin Silver $$ Contributor

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