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Sight zeroing- Query

Discussion in 'Anything Airgun Related' started by Eye2i, Oct 28, 2007.

  1. Eye2i

    Eye2i Member

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    Hello all, Im having difficult in understand my scope?

    My garden is not square, and it is about 15 metres on the left hand corner of my garden, and about 10m at the right hand side of the garden.

    I am shooting from my bathroom window at a rough angle of 20 degress from horizontal.

    I have set my scope to hit targets at the size of a thumbtack towards the left hand side of the garden.

    When i shoot targets towards the rhs of the garden (Closer) i have to aim 1/2 a milldot below the crosshairs to hit the target accurately.

    This is what i cannot understand. With the target being closer i would assume the i should aim higher than the crosshairs (lower the rifle) because the target is closer?

    If i shoot further away the target should be below the crosshairs (raising the rifle).

    My friend thinks the same as me.

    Where am i going wrong.

    Equipment. Prosport with nikko gold crown 3-9*40

    thanks
     
  2. springboy

    springboy Engaging Member

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    It will probably have something to do with you shooting at an angle of 20 degrees from horizontal.By doing this it will change the tradjectory of your shot,this is why in FT/HFT taking shots looking up or down can cause people to miss even the simplest of shots.
     
  3. topcat

    topcat Posting Addict

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    zero

    your scope is zeroed in at 15 yards therefor at ten yards the pellet wiil strike low
     
  4. Rockabilly

    Rockabilly Big Poster

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    true its called gravity;)
     
  5. topcat

    topcat Posting Addict

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    zero to hero

    its got nothing to do with the angle you say your gun is spot on at 15 yards therefore its zeroed at 15 yards and the poi will be low at 10 yards shooting up or down does alter your trajectory but you would have it zeroed between 30 or 40 yards if zeroed at 15 even on an angle it will still be low at 10
     
  6. Rockabilly

    Rockabilly Big Poster

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    northeast gods country.
    if a rifle is zeroed in on level ground, it does not matter whether you,shoot uphill or downhill the point of impact will be high in both cases,;)
     
  7. topcat

    topcat Posting Addict

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    zero

    if zeroed in at 15 yards level or on an angle your point of impact will be low at 10 yards pudding no the wonder you cant hit owt
     
  8. Rockabilly

    Rockabilly Big Poster

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    yes but the statement i made above is true prune head:rolleyes:
     
  9. Andy

    Andy Administrative Staff Member Founder

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    Here is a reticule zeroed at 15 yards with some ranges printed on.
     
  10. Andy

    Andy Administrative Staff Member Founder

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    Heres one zeroed at 10 yards to give you an idea of hold over/under
     
  11. Eye2i

    Eye2i Member

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    H
    Thanks for the replies.

    Andy, thats great, thats exactly whats happening.

    Can you tell me what the left scale is?

    Does the crosshair graph come from a program? Can you point me in the right direction where i can get it if so?

    Cheers
    Mike
     
  12. Andy

    Andy Administrative Staff Member Founder

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    http://www.chairgun.com/

    It's free to use but with nag screens, registration is £10

    Once setup for your gun it will produce graphs for holdover, retained energy, scope clicks, plus lots more

    The left scale is same as the right, it's just showing all the aim points in yards on a mill dot scope from 5 to 55 yards.
    You will have to put the correct information into chairgun about your gun to get more accurate results.
     
  13. Eye2i

    Eye2i Member

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    oh thanks Andy. I have that program here already, just not got into it at all. looked complicated at first look.

    Will have to have a closer look.
    Thanks
     
  14. Andy

    Andy Administrative Staff Member Founder

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    That's the only problem with it, it's grown so much that first time users don't really understand it as it looks so complex.
     
  15. Feral

    Feral Active Member

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    I've looked at it a few times and still can't figure it out. I definately need a 'Chairgun for dummies' book ;)
     
  16. Eye2i

    Eye2i Member

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    grrrr

    Damn this is the 4th attempt getting sick of trying.

    Feral PM me, with your mail address, and ill try to help, it wont let me post pictures this site. Getting P***ed now... grrrrr
     
    Last edited: Oct 30, 2007
  17. linkpin

    linkpin Active Member

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    I found this very useful too, as the current scopes, are quite a complex piece of optics, for the likes of myself to understand. Thanks.:): The illustrations that Andy posted, I'm talking about, now just have to try it for real.:): It was always simpler with open, iron type sights, with a weapons instructor looking over your shoulder, bit outdated that stuff I suppose nowadays.:(:
     
    Last edited: Nov 1, 2007

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