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Cork screwing????

Discussion in 'Anything Airgun Related' started by Smiler1979, May 31, 2014.

  1. Smiler1979

    Smiler1979 Active Member

    Messages:
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    Location:
    Norfolk
    Hi All,

    I recently brought a moderator adapter for my BSA BBK S10 (XTX AIR) so I can fit extra moderator. After I zeroed the rifle I swapped over the factory end cap for the S10 BBK for the new adapter and checked the accuracy on the range. Everything was good no inaccuracy's I probably put 5 pellets or so through the gun.

    I then added the HW moderator and carried out a retest on the range. I found the pellets to be 8 or so inches over to the right of the zeroed point. they still grouped OK just nowhere near where they should have landed. I returned the HW moderator to my RFD and replaced it with a new mod. and the problem still exists!!!!

    Am I missing something glaringly obvious??

    Oh you could see the pellet cork screw down range through the scope...

    Thanks again
     
  2. mattyts

    mattyts Donator

    Messages:
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    Location:
    Yorkshire
    Sounds like the adapter isn't right either its not aligned where it's clamped onto the barrel or the face isn't flush where it meets the silencer (this is what lines it up,not the thread)
     
  3. anchovie

    anchovie Banned

    Messages:
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    Location:
    nottingham
    yes it sounds like something isn't square , check also the shroud as well as the adaptor to make sure the shroud isn't slightly off because all it needs is a fraction out of true to mess things up and is there any signs of clipping on the silencer
     
  4. Greg1983

    Greg1983 Busy Member

    Messages:
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    Location:
    Hartlepool
    Also have a quick look in side the silencer at the baffles just to check if there is any trace of pellets scraping, some silencers have springs in as spacers and when assembling them the baffles can be on a slight angle and be subject to pellet clipping them.
     
  5. El Caro

    El Caro Keyboard Hero

    Messages:
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    Location:
    droitwich
    "Am I missing something glaringly obvious??"

    1) The rifle is accurate with no additional silencer.
    2) The rifle is not accurate when an additional silencer is fitted to the aftermarket adapter.
    3) The silencer has been swapped for another with the same result.
    4) I wanted to use a quote from Sherlock Holmes but cant remember it precisely:D. The remaining item not investigated is the aftermarket adapter.
    5) Swap the adapter for a new one or get your money back and buy one that lines up correctly:up:
     
  6. ratharvester

    ratharvester Donator

    Messages:
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    Location:
    Yarm on tees
    Deffo sounds like the adapter,when it's on the barrel it must be off centre but as its short the pellet clears it before it clips,add the extra length of the silencer and the off centre pellet will clip somewhere along the silencer
     
  7. Bemused

    Bemused Engaging Member

    Messages:
    438
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    Location:
    Stoke
    Now I'm just a novice but it sounds like the accuracy (grouping) is unchanged, just the POI has shifted.
    My Wolf has a POI shift with any moderator attached, but only in the order of 1 inch at 35 yards.

    What is the range of your 8 inch POI shift?
     
  8. Kada82

    Kada82 Busy Member

    Messages:
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    Location:
    Cradley heath
    Try shooting into some old rags if its clipping you should hear a meltalic sound a slight ding. I do remember fitting a carbon silencer to my old mk2 s10 carbine and the pellets were coming out side ways!!. The internals were plastic and show no sign of clipping it did it on a stealth to. Good luck sorting it bud
     
  9. mattw975

    mattw975 Big Poster

    Messages:
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    Location:
    I left my heart in Newbury
    I'm surprised it grouped if the pellets were corkscrewing.

    You may need a shorter silencer which may help.


     
  10. metalman

    metalman Big Poster

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    Location:
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    Is this not a free floating barrel, extra weight will alter POI
     
  11. mattyts

    mattyts Donator

    Messages:
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    Location:
    Yorkshire
    But a POI change wouldn't case pellets to spiral,the pellets coming out of the barrel and hitting something at an angle causes that.
     

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