Help. Power drop

Discussion in 'Tips, tricks and tutorials' started by madmax, Sep 27, 2019.

  1. madmax

    madmax Member

    Joined:
    Feb 9, 2014
    Messages:
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    Location:
    Sheffield
    My hamerli ar20 was shooting perfect @770 FPS. Come to shoot today & it's 600 to 640 FPS. What can have happend.?
    Any advice appreciated.
     
  2. beaker

    beaker Member

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    Aug 1, 2010
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    Location:
    eastleigh
    Club:
    Southampton Buccaneers
    Did it get wet before you put it away?
     
  3. madmax

    madmax Member

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    Feb 9, 2014
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    No. I'll give barrell a clean tho
     
  4. beaker

    beaker Member

    Joined:
    Aug 1, 2010
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    Location:
    eastleigh
    Club:
    Southampton Buccaneers
    Only asking as if you remove the ally shroud there is a hole right next to the hammer, had it once that water got in and slowed the hammer down. got taped up after that. or could be a pellet probe O ring or like mine, developed a kink in the hammer spring, got a new one from Judith, forget the company but found them on recommended retailers on here,
     
  5. madmax

    madmax Member

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    Had it apart. Oiled inside checked hammer & spring & cleaned barrell. Can't find out obvious. Probe seal ok. AV to go back to club now to check FPS as don't have my own crono.
     
  6. SteveC200

    SteveC200 Well-Known Member

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    Jan 19, 2012
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    589
    Location:
    Colchester
    Club:
    Iceni Marksmen
    Could be the reg pressure has dropped. My one did similar, so I rebuilt the reg, fudged around with the spring washers and sorted it.
     
  7. madmax

    madmax Member

    Joined:
    Feb 9, 2014
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    Location:
    Sheffield

    Yeh. Think it's looking that way. Guña drop it of at rednecks.
     

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