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Thread: Pellet sizes- load of bollocks!

  1. #1
    Sharp Shooter

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    Default Pellet sizes- load of bollocks!

    Allways wondered how the manufacturers managed to get such tight tollerences with their pellets so put a few to the micrometer. Couldn't find any of the ones claiming 4.52 or 4.53 anywhere close to that. The closest ones were the boxed Crosman premiers which came in at 4.49 average. JSBs were 4.42 to 4.46.

    Phoned the local consumer watch forum but they didn't seem interested!
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  2. #2
    Inactive Member

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    Have never thought of checking. That is not good news. Has anyone else found the same. Do not have a micrometer to check myself right now.
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  3. #3
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    How much of a diff is 0.04mm going to make?

    I'm happy with the acuracy of the JSB's, and so long as they go where I point them, I have no issues.
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  4. #4
    Protea FT Team '08

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    [quote1205090009=Shaan]
    How much of a diff is 0.04mm going to make?

    I'm happy with the acuracy of the JSB's, and so long as they go where I point them, I have no issues.
    [/quote1205090009]
    Shaan you make the most important point.As long as you are happy with what you use why get over technical about things.

    Mac where did you measure the pellets .Head or skirt ?
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  5. #5
    Sharp Shooter

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    Allan, I measured the heads. The point is that they advertise them as 4.52 or 4.53 so surely they should be in that region. I'm not disputing the fact that JSBs are top grade just wondering where they get that size from.
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  6. #6
    Protea FT Team '08

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    Does the micrometer not aquash the pellet when measuring ?
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  7. #7
    Sharp Shooter
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    I have read te same kind of discussion on the international forums. The general consensus was that the tight fitting skirt is more benificial for spring guns as you want the presure to build up to max before release. On cos2 and pcp it is less of an issue as you get max presure on release of trigger. The JSB's we buy here in SA are all the 4.52 variety right? I have also read a set of strings where a chap shot a brand of pellets with increasig skirt size and the results spoke for themselves the 4.52 had the best velocity.
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  8. #8
    Protea FT Team '08

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    [quote1205091820=JTK]
    The JSB's we buy here in SA are all the 4.52 variety right?
    [/quote1205091820]
    I ordered 4.50 and 4.51 from Guido a long time ago.

    4.53 are in SA as well for a little bit more cash .
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  9. #9
    Protea FT Team '08

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    4.53 have been known to push the velocity of the pellet up by 30 fps
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  10. #10
    Sharp Shooter

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    Measured carefully so as not to squash them. JTK, they are advertised as the head size being 4.53, not the skirt. I reckon the skirts baloon out from the air pressure to the bore size.
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  11. #11
    Marksman
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    guys you cannot measure lead pellets with a micrometer!

    those measurements are on the dies that the pellets are made from...you will never measure it on the pellets themselves!!

    the different sizes sometimes do make a difference in certain barrels but not always...one needs to do some careful experimenting..

    and the size is a head size not a skirt size..
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  12. #12
    Protea FT Team '08

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    I think a shadowgraph would be the best way to do it.

    I tried once with a vernier and thought the sizes wer close enough.
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  13. #13
    Sharp Shooter

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    Thanks for that guido, so I rest my case, the sizes are bollocks.
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  14. #14
    Inactive Member

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    As far as I am concerned, if my Steyr groups tightly and consistently at 45 metres I dont give a toss about pellet size cause the variation just isnt severe enough to raise alarm bells.

    Maybe if anyone, the bench rest guy's can comment having eliminated a good few variables. Just a thought.
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  15. #15
    Sharp Shooter
    SAFTAA FT Colours '10

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    Mac.. I realy think in springers it is important. You want the pellet not to start moving until you have built up the presure of the piston's forward stroke. But here yu need to test yu barrel to get the best preformace.. the fps variation was significant enough in the test I saw.
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