Extreme spread has me pulling my hair out.

Discussion in 'Reloading' started by RangerBrad, Nov 2, 2013.

  1. RangerBrad

    RangerBrad Well-Known Member

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    Hey fellas, I have tried for over a year to control my es in my 25-06 and can't seem to get a handle on it.
    I load my rounds while watching Defensive edges, reloading for long range hunting and do it step by step.
    I am reloading 115gr berger VLD's in winchester brass using 54gr of H4831sc and using federal large rifle match primers.
    Each bullet is weighed and measured for consistincy. All brass is sized using Reddining s bushing dies and seated with the redding micrometer seating die. All brass is fire formed then then head spaced .002 less, then trimmed using the sinclair mirometer trimmer then cleaned using the stainless steal tumbler to clean well inside and out. All powder is twice measured to an exact 54gr. all OAL are measured to exactly 2.707, I am setting .020 off of lands and I still have horrible es. I even sort my brass by how often it is fired. As an example I went out last week and shot 6 rounds and the read as follows. 2996,2911,2936,2943,2930,2969 All were measured with my Competetion Electronics Prochrono. My only consistency in es is inconsistency. Please help. Thank's, Brad
     
  2. Broz

    Broz Well-Known Member

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    Shoot a couple groups at 600 + yards and measure the vertical spread. Many chronographs are known to lie. The proof is in the pudding.

    Jeff
     

  3. HARPERC

    HARPERC Well-Known Member

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    If not lie, at least buried in the fine print. If I looked at the right chrony, it's listed as +/- 1%. Approximately 60 fps spread is within the advertised tolerances of the device at 3000 fps.

    You didn't mention if you're annealing case necks?
     
  4. 8andbait

    8andbait Well-Known Member

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    you could try some magnum primers or a slight increase in powder charge. If I remember correctly my favorite load with that powder and bullet was 54.3 with a fed 215 match primer. I never checked the speed but elevation was under 1/3 moa out to 700 yards.
     
  5. varmintH8R

    varmintH8R Well-Known Member

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    +1 on that. See if it shoots. If not, start changing components one at a time to see what changes. Based on the attention to detail you are describing, I'm guessing it is not a "you" problem.

    Are those 6 shots in succession, starting with a clean, cold bore?
     
  6. RangerBrad

    RangerBrad Well-Known Member

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    I'll have to look at my target from last weekend ( left it at work)for verticle but as I rember I got about a perfect triangle at 566 yds giving .6 moa
     
  7. RangerBrad

    RangerBrad Well-Known Member

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    I computed my velocity at 2938 on the br2 range finder and shooter app and was real close on the shots from 400yds and 566yds. If a chrony ain't no better than that what good are they? Brad
     
  8. Broz

    Broz Well-Known Member

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    Well the less expensive ones I owned, 4 in total, before I bought an Oehler 35 and now also a Magneto speed were not worth much.

    Jeff
     
  9. MMERSS

    MMERSS Well-Known Member

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    A chronograph is an indicator of performance, you could say a tool. You still have to put rubber to road. Some just indicate performance better than others. The Oehler and magneto top my list of "tool indicators."
     
  10. HARPERC

    HARPERC Well-Known Member

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    Every step of the way is built, or measured with devices that operate within "tolerances". When they compliment each other life is easy, when they accumulate not so much.
     
  11. RangerBrad

    RangerBrad Well-Known Member

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    I felt I had researched it and the competition electronics procrono was supposed to be a good one. Brad
     
  12. mrultramag

    mrultramag Well-Known Member

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    I would try another top performing powder and see what it reads. Blaming the chrono seems like the easy way out. with a 115, I would try H4350, RL17,19,22,25, IMR 7828, Retumbo. You're prob all set on having to use one of hodgdons extreme powders? If so you might just try some primer changes with that 4831. Are you taking your readings from at least 15' in front of the muzzle? If not, try that also.
     
  13. mrultramag

    mrultramag Well-Known Member

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    you could weight sort your brass also.
     
  14. Mikecr

    Mikecr Well-Known Member

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    22" barrel?