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Ideal Distance To Zero In Scope On 9ft/ib .22 Rifle?

Discussion in 'Anything Airgun Related' started by Zeroexpo123, Jan 11, 2020.

  1. Zeroexpo123

    Zeroexpo123 Engaging Member

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    I've got a Rifle here that averages 8.5ft/ib muzzle energy throughout the Co2 capsule. It's a .22 calibre.

    I've just download an app called chairgun, a ballistics calculator, and entered values relevant to my gun like pellet weight, fps, ballistic coefficient, etc'.

    Zeroing in the scope at around 10 or 15 yards seems to produce the flattest range without having to do holdover/holdunder, so why do people zero their scopes at around 25 or 30 yards?

    I even tried chairgun with figures from my 12ft/ib rifle entered, and 10 or 15 yards seemed best. I checked zeroing at 35 yards, and the results were ridiculous in terms of point of impact at various ranges and that would mean messing with mil dots a fair bit.

    Sorry if this appears to be a silly question, but it just doesn't make any sense.

    Why don't people zero in at these lower ranges for flatter POI curves?

    Am I missing something?
    [​IMG]
     
  2. TonyB55

    TonyB55 Engaging Member

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    You usually have two zeros, a near one and a far one. With .177 many people use 35m because the flat trajectory will give a far zero at around 50m. A .22 has a much loopier trajectory especially with low muzzle energy. At 12 ftlb with my favourite pellet I can zero at 20m and be Ok to 30/35m. Your 8.5 ftlb rifle will tend to have the two zeros quite close together. On my .177, if I use it at 10m with a 20m zero I have to bring it up 40 clicks on my scope.
     
    Last edited: Jan 11, 2020
    Zeroexpo123 likes this.
  3. robs5230

    robs5230 леший

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    what he said ^^^^^^^

    A JSB Rs in .22 travelling at around 550fps (9ftlb) with a scope height of 40mm will give basically a point and squirt between 10 and 22 yards.
     
    Zeroexpo123 likes this.
  4. JoeHeugh

    JoeHeugh Beware the Springer

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    There are two ways to zero. If you' intend shooting targets a fixed distance away, whatever that distance is is your zero, whatever happens before or after that point is irrelevant.

    The other way is using Point Blank Zero. Your scope is above the muzzle, so to pass the aim point on the crosshairs the pellet will rise up to it, continue climbing, start falling, pass through it again and continue falling. Where the pellet rises through the line of sight is Near Zero and where it falls back through is Far Zero. It is only at these zeroes that the pellet is bang on target, everywhere else it will fall high or low.

    The idea of using PBR is so you can just centre the target on the crosshairs and hit it over the longest distance but from above you can see you it's not going to be totally accurate because it will mostly be above or below to some degree. It is for you to decide how big your target is and therefore how far you are prepared for the pellet to rise and fall while still ensuring a kill. That's your kill zone, so what are you shooting, and how big do you think it needs to be?
     
  5. bigal

    bigal Jedi.

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    Test some light weight pellets. U gain the fps. So shooting straight compared to 14g plus pellets.
    Hope u get near to 570fps. ;) al
     
    rabbitwrecker and Zeroexpo123 like this.
  6. Mice!

    Mice! Busy Member

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    I've zeroed at 20 metres, I can shoot up the 30 in the garden safely but feeders for squirrels are around 20m and 25, maybe closer, this gives me what I need.
     
    Zeroexpo123 likes this.
  7. sharpsman

    sharpsman Keyboard Hero

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    Zero it where your feeders are it is where you will be taking most of your shots
     
    metalman, Zeroexpo123 and Guloluseus like this.
  8. Zeroexpo123

    Zeroexpo123 Engaging Member

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    Great info'

    Many thanks guys as always. :thumb:
     
  9. Mrbeck

    Mrbeck Engaging Member

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    I think you said it yourself buddy, I mean everyone has their own way in some sense but most will zero at 30 yards and learn what mil dots to hold under and above to hit the target 10 or 20 yards above or below the zero point. Obviously people with fac weapons might zero at longer distance all depending what they are shooting.
     
    Zeroexpo123 and metalman like this.
  10. Oat

    Oat Very Active

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    For me, chairgun can be used as a starting point to suggest zero ranges, but this needs to then be tested practically. When you have your zero set (at whatever range) it can be useful to have a small card with mils of hold over / under at say 5yd intervals.
    If for example you are always shooting at the same range then you may like to set your zero to that range.

    I shoot LSR at 20yd so have a rifle zero'd to 20yd. Then my other rifles for plinking and hunting get a zero of 30yd as over the years i have become familiar with hold over based on that.

    There isn't really a golden rule on zero distances.
     
    Zeroexpo123 likes this.

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