Christensen has me scratching my head

Discussion in 'Reloading' started by Remington92, Sep 30, 2018.

  1. Remington92

    Remington92 Well-Known Member

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    Hey there I’m haivng issues getting my Christensen ridgeline 300rum to group well. I’ve tried r26, and retumbo so far with with 215 Berger and 212 eldx. I hadn’t been having any luck so I started from scratch today and tried the ocw method. Now out of 5 groups 4 of them would would have 2 rounds touching and the 3rd about an inch away.

    Where do I go from here?

    Thanks
     

    Attached Files:

    Last edited: Sep 30, 2018
  2. rfurman24

    rfurman24 Well-Known Member

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    There is not a lot of data on those targets and even less in your post. Give us more information. If you held a gun to my head and made me tell you what step to take next I would say the two with two touching need seating depth adjustments.
     
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  3. adam32

    adam32 Well-Known Member

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    Crown...shooter error...barrel getting warm...could be many things...
     
  4. Remington92

    Remington92 Well-Known Member

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    Ok pic one is
    215 Berger
    Norma brass
    Cci 250 primer
    88gr retumbo
    2.895 off zeroed comparator

    2 is same but
    88.8gr retumbo

    3 top is same but
    89.8 gr retumbo

    3buttom is
    212eld
    Norma brass
    Cci 250
    92.3gr retumbo
    2.970 off zeroed comparator.

    Previously I had shot 90.5, 91.4, 92.3 retumbo over eldx with not very good luck.

    Waited 2 min before each shot and it’s 35* out and I did the round robin method of shooting order
     
  5. Pulpwood

    Pulpwood Well-Known Member

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    Possible barrel heating up if shot back to back. If so try letting the barrel cool down between shoots
     
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  6. RockyMtnMT

    RockyMtnMT Official LRH Sponsor

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    Make sure everything is tight and take the load as far out as you can and see if it holds thesame pattern.

    Steve
     
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  7. Pulpwood

    Pulpwood Well-Known Member

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    Shots
     
  8. Remington92

    Remington92 Well-Known Member

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    I waited till the barrel was hardly warm to the touch, how long do carbon barrels typically Take to cool?

    How long should I take it too and what will I be looking for? Thanks
     
  9. rfurman24

    rfurman24 Well-Known Member

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    Ok, if I am understanding you correctly the two groups with two in the same hole with one flyer are 88.0 and 88.8 retumbo and 215 Bergers at the same seating depth? If that is correct that looks like a small but successful OCW. The groups impact the target at the same poi. now you need to do seating depth testing in .010 increments. You did not say where you started but I would do at the lands .010, .020, .030, .040 off. at 88.4 retumbo and report back. I suspect you will have a .5moa load.
     
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  10. Remington92

    Remington92 Well-Known Member

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    Was just looking at my rifle and I think I found part of the problem
     

    Attached Files:

    300whisper likes this.
  11. rfurman24

    rfurman24 Well-Known Member

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    Ya, that is not going to work. I have moved to Seekins or Nightforce only. I think Hawkins would be good. I have had far too many problems.
     
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  12. Rick Richard

    Rick Richard Well-Known Member

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    I have all three as mentioned and they are all 'top notch'
     
  13. Remington92

    Remington92 Well-Known Member

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    They are Leupold pwr rings? Is that fairly common for these? I’ve always had decent look with them on smaller rifles. I’m just confused cause the rifle really doesn’t thump at all with that brake, and the rings were torqued to spec at the shop I bought it from
     
  14. rfurman24

    rfurman24 Well-Known Member

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    Lightweight heavy recoiling rifles with heavy scopes are hell on scope attachments. It is even worse with a brake. High quality rails and rings are the only way to go. In my opinion Talley and Leopold are junk unless you have a mild recoiling rifle with a lightweight scope. I have learned the hard way.
     
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