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Problems with Nikko Stirling 3-9x50 scope accuracy

Discussion in 'Anything Airgun Related' started by Edges, Apr 30, 2014.

  1. Edges

    Edges Member

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    Location:
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    I recently got myself a s/h HW100 with Nikko Stirling 3-9x50 scope. The kit is only a couple of years old & in excellent condition. I zeroed the scope at 30 mtrs & got a very tight group. No problems knocking over the vermin at that range. Yesterday I took time to zero the sight at various distances to establish hold over/under. Focusing down to 15 mtrs the pellets were hitting about 30mm to the left of the line on a windless day. I adjusted the scope & got bang on target. On focusing back to 30 mtrs I was hitting 60mm to the right of the line. Whatever I try, the scope seems to go out on the horizontal plane whenever I change focus distance. I expected a shift in vertical plane but this has me baffled. Any advice please?
    Thanks
     
  2. critter

    critter Donator

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    Sounds like scope is not level with gun as I had the same problem with anything over 30yrds.
     
  3. Edges

    Edges Member

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    Thanks Critter. I have re-mounted the scope but the problem persists. A check on a site giving technical advice re scopes suggested a parallax error & offered a simple test. I've tried it &, hey ho, there is a serious error in this scope. If I set the scope objective lens for 40 yards & check out a target at 25 yards there is no sideways error when I move my eye from side to side. Set it at 25 yards & the target moves by a couple of inches in either direction so impossible to line crosshair at that range setting. I will either have to paint on my own range marks or ditch the scope for something better.
     
  4. TORNADOS7

    TORNADOS7 Top Poster

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    Don't bother going any further with it matey as the scope is the problem, I've got a 3-9x42 Nikko-Airking which is just as bad !

    as soon as I alter the magnification or parallax the p.o.i shifts, I fact it's not the only scope I've got that does it !

    I've got round it by buying a fixed mag scope without parallax adjustment which I'll re-parallax to 35yds and be done with it !!!
     
  5. loki_79

    loki_79 Donator

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    Location:
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    It is probably a combination of two things, since you have already identified parallax error, but your original description is exactly the problem you would experience if your scope is mounted off centre, or worse at an angle. Both of these can be symptoms of poorly made mounts - try taking the scope of and turning one of the mounts around and see how well the two mounts line up when fitted to the dovetail.
     
  6. C_G

    C_G Junior Member

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    Location:
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    I had the same problem. For me, it was-as stated above- the paralax error and a wonky mount.
     

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