257 WBY drop @ 400?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Kaboom, Oct 4, 2013.

  1. Kaboom

    Kaboom Well-Known Member

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    I have a weatherby vangard sub MOA. I'm shooting 100 TTSX Barnes bullets in front of 64.0 IMR4350 (should be around 3500 fps. My gun is zero'd @ 100
    @ 200 I use 1MOA & 300 2MOA and am right on. Can someone give me a guess on the 400 drop? Also 10 mph wind drift numbers to go with. BC is .357
    I don't have a computor at home and my work email blocks all the weapon/bullet sites. Thanks alot. Going to MT next week for SpeedGoats!gun)
     
  2. cahunter805

    cahunter805 Well-Known Member

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    With a caliber like the 257wby I set mine up with a 300 yard zero. About 2.5" high at 100 and 8" low at 400. Id recommend at least 200 yard zero.
    To answer your original question at 400 yards it would be about 4.25moa.
     

  3. lloydsmale

    lloydsmale Well-Known Member

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    I took a little look at my load data for my 26 inch cdl and my old 24 inch vanguard my buddy now owns and If your getting drop figures from a book and dont have a chronograph id suggest backing off a bit on your expectations. Both of my guns loaded the same (same weight bullet same charge but a differnt bullet) went closer to 3350 then they did 3500.
     
  4. LONGSHOOTER

    LONGSHOOTER Well-Known Member

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    +5.25
     
  5. Kaboom

    Kaboom Well-Known Member

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    Going to range tomorrow, think I'll split the differance and try 4.75 for starters. I don't like using one zero and guessing. I thought by giving my dope numbers someone might have simalar #s for comparision.Thanks guys!
     
  6. Kaboom

    Kaboom Well-Known Member

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    cahunter805 you were right 4 MOA was right on the money. Thanks guys!
     
  7. LONGSHOOTER

    LONGSHOOTER Well-Known Member

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    You must be doing close to 3700.
     
  8. Kaboom

    Kaboom Well-Known Member

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    Yeah, now it's got me curious. May take it to my friends to run through the chrony after the hunt. I'm sure scope height makes some differance. (1.625)
     
  9. LONGSHOOTER

    LONGSHOOTER Well-Known Member

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    If you have a 100 zero proven, then set your scope at +2.5 moa for about a 330 yard point blank range. Beyond this, you will need to be dialing, or holding over/off. To dial, you will need to know your drops. It will be best if you determine this through field testing.

    Good luck on the goats.
     
  10. Kaboom

    Kaboom Well-Known Member

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    I have proven my drops out to 400 yrds now
    100 0
    200 1moa
    300 2MOA
    400 4MOA
    Will be easy to remember as it doubles from the previous yardage, same with 10mph wind
    200 2.5"
    300 5"
    400 10
    I'll just use kentucky windage for these numbers, unless the wind cranks up to 20-30. Can't wait to give it a go!
     
  11. LONGSHOOTER

    LONGSHOOTER Well-Known Member

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    Then something is funny.

    If 1 minute gets you on zero at 200, 2 minutes does not get you on zero at 300. And your 400 will be low.
     
  12. Kaboom

    Kaboom Well-Known Member

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    I know it sounds wrong but I've shot it on 4 different trips to the range and it repeats.
     
  13. Kaboom

    Kaboom Well-Known Member

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    [​IMG]
    Found this and it's close to what I'm seeing with my gun! for the 100 TSX 100 Zero
     
  14. LONGSHOOTER

    LONGSHOOTER Well-Known Member

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    Then your range has something funny happening between 200 and 300 yards.