ladder test. do you see any potential

Discussion in 'The Basics, Starting Out' started by foreign, Sep 6, 2010.

  1. foreign

    foreign Well-Known Member

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    so went out to do a ladder test today and im not sure if it means anything. i cant get anything productive out of it..
    ok the specs
    remi 700 factory 23" barrel burris scope ecg 20 moa bases
    306m
    175gr berger .010 in lands ,rusults in only about (bearing surface) .140 in neck
    varget
    rem brass
    WLR primer
    numbers on photo are powder charge, there are more 43 as i was using them for sighters
    velocity and runout
    42= 2475 0.04mm
    42.5=2502 0.10mm
    43= 2550 0.07
    43.5=2633 0.11
    44= 2589 0.11
    44.5=2627 0.06
    45= 2671 0.12
    45.5=2678 0.05
    46= 2721 0.08

    [​IMG][​IMG][​IMG]
    [​IMG]
     
    Last edited: Sep 6, 2010
  2. NomadPilot

    NomadPilot Well-Known Member

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    edit: nevermind, you fixed the pics.
     
    Last edited: Sep 6, 2010

  3. SBruce

    SBruce Well-Known Member

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    Seems weird to me that the 46 and 46.5 charges went into the same place (vertical) as the 42.5 and a couple of the 43 grn loads. Perhaps its due to a change in harmonics or "barrel whip"?

    Almost appears to me that the test needs to be done at a further distance if possible...??

    Without shooting at further ranges, I'd stick with the 46-46.5 loads and shoot some 3-5 shot groups and see if their acceptable for what you're after (assuming that they weren't over max pressure)

    Something else that can be done is changing your seating depth on the 46-46.5 loads and do another test with varying seating depths........just an idea, it may not be needed depending on your accuracy requirements.
     
  4. Forester

    Forester Well-Known Member

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    I use the ladder test as a starting point for load development in every rifle I fool with. That latter looks to me like one shot at too close a range.

    The more accurate the rifle and shooter are the farther the ladder test needs to be shot. I usually do them at 400-500 yards.
     
  5. jrw1976

    jrw1976 Well-Known Member

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    I would go with a load between 45 - 45.5 because those 2 rounds are on the same rung of the ladder and do some more shooting in that load range to find the perfect load.

    I hope that helps, Jason