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Mystery Holy Grail Pellet Search..

Discussion in 'Airgun Data Center' started by Cpmwasp, Aug 16, 2020.

  1. Cpmwasp

    Cpmwasp Well-Known Member

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    Mystery holy grail pellet.?
    Hello, im going to spread my search to this forum in the hope of getting a mystery new pellet identified. And its so accurate.
    First let me explain how this came about.
    I've been shooting air rifles for years and as an engineer and perfectionist, ive been modifying my rifles for maximum accuracy. I had a Sharp innova, 22 and as anyone who has actually owned one, will know, they were pretty awesom in the day.
    The strange thing about this rifle was that the more lead that got pushed down the barrel the more accurate it became, slightly off set by its general state and wearing out, I wanted a new one.
    I purchased two Webbley Rebbels one in 177, and one in 22. I soon discovered that these foreign coppies were not up to the Sharp quality, so i re engineered them both.
    Ill discuss all the 12 or so serious mods that are mostly machining new parts, in a later post if asked to do so.
    So having re barreled the rebel 22 with the salvaged sharp 6 land barrel, and made a 80 gramm aly silencer, and fitted a powerful hawk scope. I have tested dozens of makes of pellets for the best accuracy.
    Gamo match were pretty good but going to jsb exact jumbo rs diabolo 5.52 mm 13.43gr was a big step forward. I had a very good pellet for both target and hunting.
    After ordering more tins from my french supplier, i now had run about 2000 jsb's through this gun ( out of well over 10000 pellets of other makes) i came across a tin that despite being badged as jsb exact jumbo rs diabolo 13.43 5.52 and same batch number, out performed the others by a BIG margin. They have an almost flat trajectory, with little drop, +6 cm at 25 meters.... Yes thats a full 6 cm less drop than the jumbo rs at 25 meters.. And im shooting them at around 300m/s
    And unbelievable accuracy at 75 meters. Hitting a 2cm target at 350m/s 75 meters.
    So what are these mystery pellets....

    The pellets are lighter at 13.34gr
    Slightly shorter, at 6.76mm
    Have a banded waist of 4.1mm
    Band is 0.9mm
    And the C og G is further forward.
    They closley resemble the Falcoln accuracy plus, pellet but the dimentions and weight dont tally. The falcon is the same weight as the jsb but the mystery pellet is 0.09gr lighter, 0.09mm shorter, and has a less deep hollow.
    So i have tried to get info from my supplier, their French main distributor, and even JSB in thr Czech Republic so far with no results... Is this a secret under test new pellet?
    Ive trawled through hundreds of brands of pellets, (jsb make pellets for 50 or more brands) and still not found a match.
    The pellet came from the jsb factory, and must have been a batch sample returned to the packing area and mistakenly put in a jumbo rs tin...
    So am I the first person to unofficially test this pellet.
    If you know of any information on a new pellet that matches this discription please tell me as it's the holly grail for my rifle.
    Again its a domed diabolo, with a flatter dome than the jsb jumbo rs at just 2mm
    Overall length is 6.67mm
    A waist band of 4.1mm dia and 0.9 width.
    Internal depth 3.7mm.
    Rear skirt of 2.45mm
    And just 13.34 gr as opposed to the 13.43gr on the std pellet.
    What ever this pellet really is, im going to be buying it in bulk.
    And ill post a free tin of 500, jsb exact jumbo rs diabolo 5.52 mm. 13.43gr to the first person to identify correctly the mystery "holy grail" pellet.
    Then you can test the difference if you have any of the mystery pellets.
    Colin.
    Cpmwasp
     

    Attached Files:

  2. ZAKDINGEL

    ZAKDINGEL Engaging Member

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    They look very much like the old school Crossman premiers ?
     
  3. Brock1Rgj

    Brock1Rgj Posting Addict

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    Skirts too long and the old premiers had no hollow up the middle.They look simular to H And N field target trophy to me .
     
  4. Cpmwasp

    Cpmwasp Well-Known Member

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    Sadly no, the H&N field target trophy don't have that waist band, and are both longer and heavier..
    Also the dome is much higher...
    I will try again to get some info from jsb but they seem to be keeping sthum, ive even had the importer email them...
    Either their customer service is the world's worst, or they have a guilty secret they are trying to hide...
    Id love to test some in another rifle, perhaps a FX predator, or impact.
    If i cant get the pellets then ill have a die made and make my own. If i change something, very slightly, it can go either way, slightly better or slightly worse, but even a pellet that performs 95% as well would still be awesom.
    Keep looking guys....
     
    Phil Collins likes this.
  5. HW100Tuning

    HW100Tuning Being on holiday is no Picnic

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  6. ratman60

    ratman60 Very Active

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    Hello, who makes FX pellets ?
     
  7. f1swk

    f1swk Engaging Member

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    those are falcon accuracy plus pellets,very similar to jsb rs,but seem better
     
  8. f1swk

    f1swk Engaging Member

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  9. SamG340

    SamG340 Posting Addict

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    Been doing some searching, I've found a few pellets weighing 13.34 gr, one was a HW .20 pellet, one was .22 but had a skirt like RWS Field Lines.

    Seems to be a very hard pellet to find ... Are you sure on the weight ?
     
  10. SamG340

    SamG340 Posting Addict

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  11. Cpmwasp

    Cpmwasp Well-Known Member

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    [QUOTE="Sam

    Seems to be a very hard pellet to find ... Are you sure on the weight ?[/QUOTE]
    Hello, yes ive taken 100 and weighed them together and divided by 100 to get a more precise weight.
    Still no feedback from the makers jsb
    Im sure these are a special competition variant not sale normally.... It doesn't show jsb in a good light..
     
    SamG340 likes this.
  12. BallisticBill

    BallisticBill Too much keyboard, not enough action!

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    I think the mystery pellets are some made during the setting at the start of a batch. JSB change the insert/probe used to form the skirt of the pellet so there are variations between batches. Although there shouldn't be a variation within a batch, JSB seem to be producing batches with different sizes nowadays... sometimes different shapes/sizes in the same tin!

    The variations in length and weight you measured are normal variations you'd expect between JSB dies. And sometimes there are large variations between different batches from the same die where the different inserts are used. When you weighed the pellets did you also weight the others from the same batch? If they are truly from the same batch you might expect the weights to be the same because the blanks are pre-formed... unless they've changed to a different spool of blanks and that's why they've had to change the insert. Whatever it is, I'd put it down to poor quality assurance.
     
    SamG340 likes this.
  13. BrettMRC

    BrettMRC Donator

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    Suspect if you contact JSB they will let you know what the dimensional tolerance should be per pellet?
    If you are seeing them outside of that then you can point them out and ask they do a bit more in process inspection!
     

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