Results 1 to 14 of 14

Thread: Line of sight

  1. #1
    Sharp Shooter

    User Info Menu

    Default Line of sight

    Why do one get the following problem? Or must I say some of us.
    My rifle is zero'd at 25 metres. But when shooting at for instance 10 metres the pellet is shooting 3-4mm to the left. Surely one should only compensate for height at different distances? I know 3mm is almost nothing but I'm sure it should stay on a straight line at any distance if you ignore the effects the wind may have on it. If my .22Lr can stay in a straight line from 5 metres to 100 metres might that mean that my airgun's "mounting bridge" can be out of sync? I'm using the same mounts on both guns. Lynx B-Square. Any advice?
    Sign Up To Air Rifle SA Forums

  2. #2
    Sharp Shooter

    User Info Menu

    Default

    Its possible but probably has more to do with the pellet. Have you tested different types of pellets to check the result?
    Sign Up To Air Rifle SA Forums

  3. #3
    Inactive Member

    User Info Menu

    Default

    Check your mounts they may not be alined 100%
    Sign Up To Air Rifle SA Forums

  4. #4
    Sharp Shooter
    The Professor

    User Info Menu

    Default

    As Wally says above, but also are you perhaps canting the rifle slightly?
    Sign Up To Air Rifle SA Forums

  5. #5
    Sharp Shooter

    User Info Menu

    Default

    I dont know how to check the mounts. I use Crosman Premiers. Can pellets do this?
    Sign Up To Air Rifle SA Forums

  6. #6
    Inactive Member

    User Info Menu

    Default

    25mm or 30mm use a long tube and mount as a scope. Check then if the tube is lining up with the barrel. Mount tube with a long piece towards the barrel.
    Sign Up To Air Rifle SA Forums

  7. #7
    Sharp Shooter

    User Info Menu

    Default

    I will have to try this. Thanks for the advice.
    Sign Up To Air Rifle SA Forums

  8. #8
    Protea FT Team '12/'16/'17

    User Info Menu

    Default

    you can proove that it is the mounts if you shoot furthure than the zero and it is out to the other side then the mounts are out.
    Sign Up To Air Rifle SA Forums

  9. #9
    Protea Benchrest (Air) Team '08/'10/'11/'13/'15

    User Info Menu

    Default

    a neon light tube can also be used to check the aliment it fits in the 25mm scope rings
    Sign Up To Air Rifle SA Forums

  10. #10
    Inactive Member

    User Info Menu

    Default

    scope's crosshairnot verticle... close range and long range poi opposite
    Sign Up To Air Rifle SA Forums

  11. #11
    REP: Oom A's Airguns

    User Info Menu

    Default

    Not having the scope opticaly centred before mounting can also cause this problem.
    Sign Up To Air Rifle SA Forums

  12. #12
    Sharp Shooter

    User Info Menu

    Default

    I did not optically centered it at all. I believe it is far from that point. I will test all these thing this weekend. Including shooting it at further distances. But at further distances it does not shoot one hole groups anymore so it will be more difficult to see the error. Maybe I should get a set of adjustable mounts and start with optically centering the scope. But if you read what Boondock said above will this really help if the verticle crosshair is not true?
    Sign Up To Air Rifle SA Forums

  13. #13
    Sharp Shooter
    The Professor

    User Info Menu

    Default

    Regarding the vertical set up of the reticle, check this one first by putting a bubble tube from a spirit level across the scope rails to check the rifle is upright then sight onto a plumbline to check the reticle.

    If the reticle is slightly out of true then you will get a a situation where the pellet's flight line will not follow the cross hair.

    Assuming the reticle is correctly set-up (and it is amazing how many rifles I have looked through that have a scope that is out of true) then canting (leaning) the rifle will also cause an effect such as you originally describe.
    Sign Up To Air Rifle SA Forums

  14. #14
    Protea FT Team '07/'08/'09/'10/'11/'12/'13
    National FT Champ '09/'13

    User Info Menu

    Default

    Definately the mounts is not aligned correctly. Do what Wally sugested, by using either a neon tube, or a straight broomstick. The pellets cannot do it.
    Sign Up To Air Rifle SA Forums


Similar Threads

  1. peep sight or aperture sight for hw77k
    By Sameer in forum Optics | Sighting | Illumination
    Replies: 2
    Last Post: 13-07-15, 10:41
  2. Drawing the line...
    By Bakersman in forum Airgun Discussions
    Replies: 43
    Last Post: 30-01-13, 14:48

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Friends of Air Rifle SA