[Q] A-Frame/air cylinder

Discussion in 'Hunter (HFT) & Field Target (FT)' started by iscao, Sep 7, 2018.

  1. iscao

    iscao Member

    Joined:
    Dec 10, 2015
    Messages:
    105
    Location:
    Oporto
    Hi guys,

    I know that absolutely nothing should touch the barrel.

    But what about the air cylinder? When you charge it, the metal will definitively expand so it brings my doubt.

    If the A-Frame doesn't have enough space to prevent the cylinder touch´s, even slightly, the A-frame when it expand, this will affect the trajectory?

    In my case ,removing the A-Frame it´s not an option. And yes, mine has pretty space to accommodate the barrel.

    Regards
     
  2. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    11,976
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    I had a problem with this on a custom wooden stocked walther. I've also seen it on Alutec Walthers. Both in reverse, heat and humidity moving the chassis which moves the reg/cylinder which moves the barrel (even if it's floated)... so now all my guns are entirely floated.
     
    iscao likes this.
  3. fatwelshboy

    fatwelshboy Member

    Joined:
    Aug 18, 2011
    Messages:
    188
    Location:
    Pontypridd
    Club:
    Nelson FTC
    I know of a floated FTP that had issues with zero shift. The cylinder was touching the stock and after sanding the stock away for clearance the zero shift went away.
     
    iscao and RAMBO like this.
  4. iscao

    iscao Member

    Joined:
    Dec 10, 2015
    Messages:
    105
    Location:
    Oporto
    Thanks ;)
     

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