Turrent adjustment confusion

Discussion in 'Long Range Scopes and Other Optics' started by Greg Duerr, Sep 18, 2013.

  1. Greg Duerr

    Greg Duerr Well-Known Member

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    If you sight in your rifle at 100 yards and you range a deer at 645 yards what adjustment to your turrents would you make. Do most LR scopes have a 1/4 or 1/8moa adjustment............................How do you know how many clicks

    Totally in the Dark......................

    In the past I would sight in so that my bullet according to the ballistic tables showed that for me to be right on at 300 yards I had to sight in so many inches high at 100 That way from 100 to 400 I new I could pretty much hold dead center and make a hit. Once past 400 I was lost............... Have no idea of how many clicks in elevation to make to have the bullet hit at what ever range you range finder gave you..............
     
  2. Sully2

    Sully2 Well-Known Member

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    The majority of scopes have 1/4 minute clicks....each click raises ( or lowers) the bullet 1/4" at 100 yards

    As far as how to hit way out there...you should have run a ballistic program on your round...plugging in the BC of the slug.....your velocity at the muzzle and tell the program where you are zero'd at ( distance) and it will spit out to you how much drop at each 50yard distance all the way to 1000 yards.....and how many inches you need to come up and how many MOA's you have to adjust to get it dead center at "X" distance
     

  3. Greg Duerr

    Greg Duerr Well-Known Member

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    so if you have the data and it says that at 625 yards you bullet will drop 26.36 inches what adjustments do you make on your scope assuming it has 1/4moa?
     
  4. LongRangeBangin

    LongRangeBangin Well-Known Member

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    For giggles I played with your numbers. I came up with 16.87 clicks. Probable wrong. But I think that should be close?
     
  5. Bodywerks

    Bodywerks Well-Known Member

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    Need more info to help you out. Specifically, the caliber and weight and name of the bullet you're launching, as well as the velocity.
    My 140 amax's need 12.2moa(49 clicks) with a 100yd zero and 2900mv to get there.
    My 300 bergers need 12.4(50 clicks) with a 2700mv
    250 bergers need only 10.6moa at 2900mv
    Been a while but I believe my 155 scenars needed about 12.5 minutes at 2820mv
     
  6. LongRangeBangin

    LongRangeBangin Well-Known Member

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    Sorry didn't finish out the math for you 67.48 clicks or 16.78 on your dial. Not exact. , but close enough I wouldn't want you shooting at me .
     
  7. Greg Duerr

    Greg Duerr Well-Known Member

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    so how do you convert inches to clicks? Some programs will give you bullet drop every 10 yards.

    In your opinion is elevation clicks better and more accurate than recticle lines in your scope like the NF Velocity reticles...........................?
     
  8. stomp442

    stomp442 Well-Known Member

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    Change your ballistics program to calculate moa instead of inches and it will tell you what you need to dial on the turret. Otherwise take your inches divided by yards then divide that number by 1.047 and that should give you the number to turn to on your dial. So for example your ballistic program says you have 100.52 inches of drop at 650 yards you would take 100.52/6.5= 15.46 then you divide 15.46 by 1.047. 15.46/1.047 = 14.77. Which means if you have 1/4 inch clicks you would need to dial 3 clicks past the 14 on your target knob.
     
  9. Hunter02

    Hunter02 Member

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    I would recommend thinking of your adjustments in MOA not inches. MOA is an angular measurement, kinda like a piece of pie going out if that makes sense. 1 MOA at 100 yards, will be different than 1 MOA at 200 yards, and so on.

    I understand MOA and thinking of it in inches just confuses me.
     
  10. theo98

    theo98 Well-Known Member

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    Greg,

    Have you tried JBM - Calculations - Trajectory ?

    Once you have plugged in your ballistic data, the JBM Calculator can lead you to whatever information you're looking for.

    If your scope elevation turret is in 1\4 moa, then 4 clicks=1 moa of adjustment or about 1" @100yds, 2" @ 200 yds, 3" @ 300 yds, etc., accurate enough for large game hunting. For instance, in my gun\scope\ammo ballistics, 50 clicks (12.5 moa el. adjustment) gets my POI dead on at 600yds!

    Hope this helps...

    Ted
     
  11. joseph

    joseph Well-Known Member

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    There is an easy solution to your problem. Shoot a drop chart with YOUR rifle then have a custom turret made. Use your laser rangefinder to find the distance then turn your turret to that distance and hold for the wind and shoot.

    Read this:

    http://forum.gon.com/showthread.php?t=564977&highlight=

    gt40