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Zero Issue, Elevation Turret Maxed Out?

Discussion in 'Technical' started by Dynodoy, Aug 30, 2020.

  1. Dynodoy

    Dynodoy Member

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    Hello,
    I recently purchased a second hand Weirauch HW95, it’s an older model without the silencer but a muzzle brake instead?
    I mounted an old Hawke Reflex 3-10x44 which was on my Air Arms S200.
    There are no issues with Zero with this combo.
    However, when mounted to the Weirauch, L&R fine but elevation turret maxed out and still out!!
    I’m hitting targets @25yards but having to aim one Dot below crosshairs? This is the same all the way down to 10 yards?
    It is mounted on a one piece Bisley mount.
    Any advice would be very welcome.
     
  2. BallisticBill

    BallisticBill Looking outside the box

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    If the barrel is locking up consistently and you get good groups take the easy option and get adjustable mounts. Or, to fix it on the cheap, shim the mounts.
     
    Mr Daniel G Seddon and Dynodoy like this.
  3. sharpsman

    sharpsman Very Active

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    Check if the barrel has been bent , I would try another scope and mounts if your not sure
     
    lee71, Kelma89 and Dynodoy like this.
  4. brk1

    brk1 Posting Addict

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    Either got to buy some elevation adjustable mounts (£80-90), or shim the back scope ring with something, plastcic, sticky tape , metal drinks can, sounds like you have a case of barrel droop :). or try cleaning your barrel detent system in case you've picked up some krud in it :)
     
    Dynodoy and paj like this.
  5. BallisticBill

    BallisticBill Looking outside the box

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  6. That hurts

    That hurts Barely Active

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    Centre the scope and try again - if that doesn't work, swap the mounts round before buying a new set or shimming
     
    SamG340, pjgtech, paj and 1 other person like this.
  7. Dynodoy

    Dynodoy Member

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    Cheers BallisticBill!
     
  8. Dynodoy

    Dynodoy Member

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    Thank you for the reply.
    I have assumed that the mounts was fitted correctly as it had a ‘pin’? To align to one of the holes in between the dovetails?
    I have meticulously done what I thought and read about online.
    Though I must admit, I have not shot a break barrel much. Last spring gun I had was a TX200.
     
  9. Dynodoy

    Dynodoy Member

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    Pardon the ignorance, but what is barrel detent?
    And thanks for the reply.

    ... just googled it! :)
    No, everything seems very good around that?
     
    Last edited: Aug 30, 2020
  10. BallisticBill

    BallisticBill Looking outside the box

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    It's the spring loaded mechanism that holds the barrel in the closed position.
     
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  11. brk1

    brk1 Posting Addict

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    It's what keeps the barrel shut after you have cocked the gun and shut the barrel, a little pointed sprung loaded metal pointer , it either goes onto a hole or locks under a similar item on the action side of the gun.:thumb:. Open you barrel and look inside , yu won't need to fully cock it. several break barrels air rifles suffer this fate , you haven't got a rare one, I know :rolleyes::rolleyes:, I've got one too, it's possible a different scope will have a bit more adjustment and will be able to zero without the need for a shim at all :thumb:

    And ballistic bill types faster than me aswell :D:D
     
    Dynodoy likes this.
  12. Dynodoy

    Dynodoy Member

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    Thank you brk1! :)
     
    brk1 likes this.
  13. Dynodoy

    Dynodoy Member

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    Thank you all for the great advise.
    I shall try them out and fingers crossed!
     
  14. td_boy

    td_boy Donator

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    If it was me... I'd first check the scope functions correctly.
    Easiest way is demount it and put it on a mirror and you will see the crosshairs looking back at you.
    Move the turrets to centre the cross hairs on top of each other and check each axis moves in both directions as it should.
    The scope is now optically centred as well.
    If you now run out of elevation then it's very likely the issue is with the rifle and this needs fixing rather than shimming or putting adjustable mounts on a damaged rifle IMHO.
    You said the rifle was new to you secondhand - perhaps the vendor was off loading a problem?
     
    Dynodoy and BallisticBill like this.
  15. pjgtech

    pjgtech Where we're going....we don't need roads...

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    ^^^THIS^^^ :thumb:
     
  16. Patrick

    Patrick Donator

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    Two words, BARREL DROOP(not to be confused with a bent barrel). It's fairly common on some brake barrels guns. The Weihrauch HW35 years ago was known for it but it's not exclusive to that gun or to Weihrauch. I had a Gamo Shadow RSV that suffered from it
    It can vary in degrees too,on some guns it's pronounced enough to notice it by looking at the gun sideways on others it so slight it's not noticeable just by looking at the gun but still sufficient for you to run out of elevation adjustment before obtaining zero, this was the case with the Gamo i had.
    If it is barrel droop and not something else causing it you have one of two options i.e shim the lower cradle of the rear mount or buy a droop compensation mount(s).
     
    Last edited: Aug 31, 2020
    Dynodoy likes this.
  17. Dynodoy

    Dynodoy Member

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    Thank you.
     
  18. td_boy

    td_boy Donator

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    While this used to be an issue with all the 35 and the 80, did it affect 95's?
    Is the lock up solid and secure? - any weakness there can also throw things off.
     
    Dynodoy likes this.
  19. brk1

    brk1 Posting Addict

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    It affects different guns,not just Weihrauchs, see Telephonepetes post reply ,

    https://www.airgunforum.co.uk/community/index.php?threads/hw99s-barrel-droop.232703/

    he had a very obliging RFD that he regularly used, who used to let Pete pick the gun with the least amount of Barrel droop then mix it with the best looking stock, they were all brand new 99's, solid lock up makes no difference to these guns , they already achieve this , the barrels aren't in line with the actions , some by loads , some just enough to make the scope Zero awkward, unfortunatley there isn't much you can do for it mechanically either, if you are using the open sights you won't notice this as you are using the barrel to aim with and not a scope which is horizontal to the action but not the barrel :(.

    Yes the 35's had a bit of a reputation for it but they weren't alone as the only guns to suffer. There's even some case of rifles that aren't break barrels that had the same problems :(
     
    Dynodoy likes this.
  20. ajohn

    ajohn Chewing Things Over

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    There is mention of a barrel bending jig to correct it. USA Pyramid Air I think. LOL Good luck. It's a common problem and invariably barrel droop. Ideally for perfect zero hold etc the scope adjustments should be centred and then shims added to get it pretty close.

    One of the problems is zoom and probably better scopes = less available adjustment. On spring guns I rather like converting to weaver. An adjustable one is around. It's a pity some one doesn't produce something simpler and I believe as it comes it will only fit 3/8" dovetails.
     
    Dynodoy likes this.

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