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scope alinement theory

Discussion in 'Anything Airgun Related' started by peterpan, Apr 10, 2014.

  1. peterpan

    peterpan Engaging Member

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    Location:
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    can anyone tell me if the theory im using will be accurate with lining my cross hairs up perfectly plum ..iv been balancing my rifle on a case gaurde rifle rest then i have a small spirit level that sits rite at the back of my 97k stock once iv got it flush i then sit the spirit level on the top turret on my scope then tighten my screws correctly when i have the level flush .checking as i tighten to make sure the stock and scope have not lost there flush level. iv just checked my set up and its bang on level..too look through the scopes it does look perfect and iv always stuck by that theory .but of late my 22 97k has been spot on at 30m but out at 50 60m my pellets have been curling off to the right using h&n ftt i know this can be caused by uneven cross hairs ..but then im thinking could it be wind .is a 22 pellet still affected by wind at 30m because like i said its bang on at 30m then veers off to the rite but still group im usually pritty good with guessing windage just seems a bit dodgy. never had this problem when i was using aa field pellets had to change pellets cos all mt locals have sold out .any views on this would be appritiated thanks pete
     
  2. milek

    milek Honorary Member

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    Is the wind blowing to the right?
     
  3. Tripleteer

    Tripleteer Donator

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    all pellets will move in the wind if it's strong enough! Spirit level use in setting crosshairs is common practise. If the gun is firing to the right set the target up where you are stood then go and shoot from where the target was. If it is the wind your gun pellet will move to the opposite side. atb Paul.
     
  4. Dunkman

    Dunkman Posting Addict

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    Don't use the spirit level on the top turret as it may not coincide with the reticule alignment. Us a plumb bob (weight on a piece of string) downrange and if it is windy, drop the weight in a glass of water to stop it swaying. Level the stock at the back with a small spirit level and check the vertical crosshairs against the plumb bob and hey presto, perfect alignment throughout.
     
  5. OzzyJ

    OzzyJ Donator

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    this is how I was always taught to do it too.
     
  6. mattyts

    mattyts Donator

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    We do the same but we take readings off the action to level the gun up,not the stock
     
  7. Dunkman

    Dunkman Posting Addict

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    leveling the action is the best way provided it is squared off like a typical PCP action block but on a 97k, the action is round so the only bit you can use to level is the bit of stock immediately behind the round trigger block.
     
  8. mattyts

    mattyts Donator

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    Ahh,on my break barrel we would usually put the level on the breech block
     
  9. Ichabod Armacost

    Ichabod Armacost Donator

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    Well, I never knew that, mind you, never had a scope on a rifle, always just used open sights 40 years ago. good here innit!:cool::) Ta very much!
     
  10. terry1001

    terry1001 Major Poster

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    If it's not the wind then it's almost certainly the different pellets. Just checked in Chairgun and the effect of a 5mph wind at 30 yards is 0.8 inches but at 60 yards it's over 3 inches. As the pellet slows then the wind has more effect.
     
  11. loki_79

    loki_79 Donator

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    How far is it out at 50/60m? If it is wind it will change from day to day, or go somewhere where you can shoot in both directions. Have you ruled out misalignment of scope mounts, cant or parallax error. The easiest one is to try canting your rifle to the left on purpose and see if that fixes it.
     
  12. Largerider

    Largerider Posting Addict

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    I had the same problem with my 97k even after plumbing everything up using a plumb line. I put a set of 1 piece BKL mounts on now it stays true at any range.
     

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