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The Cloverleaf Tune

Discussion in 'Anything Airgun Related' started by Tan, Jun 10, 2014.

  1. Tan

    Tan Donator

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    Hello.

    So, after almost 18 months of owning an S410F, it was finally time for it to have a service -- even more so because it dropped in power from 11.3 to just a little over 10 ft lbs (something that was really annoying me).

    Having bought the odd item off forum member Cloverleaf, and also getting him to repair a leak in another rifle, I was happy to once again use him. I dropped my rifle off and was told that it would be ready to collect in one week, which it was.

    Last night, I finally got a chance to test it, and I cannot begin to tell you how happy and impressed I am. Below is what has been done to it:

    - Remove AT/stripped rifle
    - Clean everything
    - Remove surface rust from striker and a couple of tiny patches on the barrel
    - Clean and polish loading bolt shank and striker rail
    - Fit new polished exhaust valve
    - Fit spacer to rear of striker
    - Fit new port adjustor cover screw
    - Replace gauge dogleg seals
    - Reassemble rifle with proper lube
    - Set muzzle energy

    Cloverleaf tells me there was a fair amount of flaky surface rust on the striker (some of which had come off) possibly as a result of water having got in through the bolt housing at some point. There was also a tiny patch on the RHs of the barrel and a little under the barrel band -- all of which he has removed.

    When the gun went back together, it was only producing around 10.9 ft lbs (which is unusual on an untouched gun with a new valve) so he added a spacer to the striker and tweaked the port slightly. It's now doing around 11.6 ft lb at 150 bar (peak valve efficiency pressure) with AA Fields, giving an ideal fill pressure of 180-190 bar.

    Although a full string has not been run through it, consistency over the 10 shots at 150 bar was excellent -- the velocity values were all 576 or 577ft/s, with one slightly spoiling it at 574ft/s -- 3ft/s or just over 0.5% (about as good as you could ask).


    Many thanks to Cloverleaf for his hard work, and providing such an excellent service. I would highly recommend him.

    T.
     
    Last edited: Jun 10, 2014
  2. Cymru-Dave

    Cymru-Dave Donator

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    Sounds like a real decent service, I'm sure cloverleaf will get plenty of business off the back of this thread!
     
  3. stevemandm

    stevemandm Honorary Member

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    great job (as usual), and that spread over 10 pellets would be great for a regulated shooter
     
  4. p45ton

    p45ton Busy Member

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    .

    Is 11.6 ft lb going to be a little too close to 12ft lb (or past) with a heavier pellet?
     
  5. larryking28

    larryking28 Busy Member

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    With a heavier pellet the FPS will be lower so it balances out overall.
    My Rapid in .22 does about 600 FPS with Accupell which are 14.3g so power is about 11.6
    With AA diablos which are 16g it does about 570 which again comes out at nearly the same,11.5
     
    Last edited: Jun 10, 2014
  6. stevemandm

    stevemandm Honorary Member

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    not always mate - our .177 ultra outputs 11.5ftlb with 10.6gr bisley magnums, and 11.0ftlb with 8.64gr jsb exacts.
    so in theory, if it was set to 11.5ftlb with the exacts, it would be bordering on illegal with the magnums
     
  7. larryking28

    larryking28 Busy Member

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    Yes I know but I was under the impression that you would usually set up a rifle with a heavier pellet and get that under 12 ft/lbs rather than the other way round?
     
  8. stevemandm

    stevemandm Honorary Member

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    the difference in power between light and heavy pellets is sometimes less pronounced in certain set ups. I'm sure cloverleaf will have tested it with a multitude of pellets , and set it up accordingly.
     
  9. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    I just set mine up with the most accurate pellet at about 11.2:)
     
  10. David M

    David M Donator

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    My .22 springer runs at 11.4ftlb with 13.4gr Falcon Accuracy Plus and heavy Bisley Magnums but only 10.4ftlb with RWS Superdomes for some odd reason. I know a lot of people set up their gun with this mid weight pellet, if I had, I'd have had a shock later on....!!

    Sounds like a good thorough service from Cloverleaf.......:up:
     
  11. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    Thanks Tan - I'm very pleased to hear you're happy with it :)

    Most importantly with the AT gone you're now free to control the muzzle energy / work on the gun yourself, rather than having to rely on someone else to do it for you at however many pounds per hour.

    I've always found the AA Fields to be most efficient through .22 400 series guns. Of course now if a pellet is found that pushes the rifle over the top, tweaking the energy down to a legal level is a matter of 5 minutes with a chrony and Allen key, rather than the usual hour of swearing and butchery that's required when anti-tamper is involved :rolleyes:

    Not that I'm actively fishing for work, but I'm always happy to sort out these rifles if anyone local requires anything doing :up:
     
    Last edited: Jun 10, 2014
  12. Cymru-Dave

    Cymru-Dave Donator

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    Top man, shame I ain't local!
     
  13. 177man

    177man Engaging Member

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    Thats just what i was thinking Si
     
  14. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    Thanks chaps :)

    Just to make it clear monies did change hands - sadly I don't have the financial luxury to do this sort of work for nowt; much as I'd like to be able to :p
     
  15. ratharvester

    ratharvester Donator

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    Wouldn't it be great if every county had a cloverleaf :)
     
  16. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    lol - ta - I'm sure some couldn't think of anything worse :p
     
  17. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Sounds like a top job mate,

    we love you;);)
     
  18. Jim of Cov

    Jim of Cov Donator

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    When I read 'The Cloverleaf Tune' subject thread I thought it was some kind of target shooters Camp fire song! Y'know like "Ging gang gooley..." or "Kumbayah my lord..." Suggestions on a postcard please to Cloverleaf, England, UK.
     
  19. Tripleteer

    Tripleteer Donator

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    Top Man, Such a shame he is not from Yorkshire!!!!!??
     
  20. Dr B

    Dr B Grizzly Airgunner

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    Does Holmfirth still have the Compo café when you drop down from Saddleworth moor? Happy days.....
     

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