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Pellet Sorting...weight, Size & Accuracy

Discussion in 'Anything Airgun Related' started by Ramsay, May 15, 2021.

  1. Ramsay

    Ramsay .... gone Plinking

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    Range time.jpg

    Hope everyone is well and safe
    .... I haven't had much time over the winter, but the spring is definitely here now and a little more hobby time.. :)
    My supply of JSB Redesigned ran out.. I have a few tins of JSB Monster 13.43 gr which I thought would be fine to warm up with.. the accuracy was good but not consistent.. probably just me a little rusty.. No !! not possible said a little voice in my ear.. So out came the chrono, then the pellet scales...
    I had noticed through the scope that some pellets had lost stability and were flaring before reaching the target at 50 meters..
    The chrono showed a spread of 20 fps, which isn't criminal, but it could explain a little..
    13.43 gr.....From a fresh tin of 400 not a single pellet showed that exact weight, but I was more interested in variation. The pellets in the tin haven't been washed or removed from the tin, after the first hundred or so pellets had been sorted by weight, I was seeing a tendency.. there were far more pellets in the 13.48 -13.57 group than there were in the 13.28 -13.37 group.
    As I was getting deeper in the tin the weight seemed to drop and the lighter group increased in size.. As if the heavier pellets were mostly at the top of the tin.. I made several checks with previously weighed pellets, to be sure no change on the scales. One of the last pellets out of the tin was the lightest at only 13.16 gr (the heaviest was 13.68 gr)
    More testing is needed... but I am hoping for your response, about weighing & head size sorting.

    Monster weight.jpg

    PS. where can I find a good pellet gauge for .177 ? :thumb:
     
    Arrizabalaga likes this.
  2. Figgy

    Figgy Very Active

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    For some people they don't care and shoot from the tin and get what they get.
    Others have guns that are not fussy and shoot at ranges where the difference isn't going to make a difference.
    Then you have some like me, if the next pellet didn't go through the same hole I want to know why. Have poor quality control on what goes into a tin that states exact is a pee take.

    You can buy pellet gauges, there was a fella on here sold his a little while ago, it's a plate with holes of exact sizes.
     
    Ramsay likes this.
  3. scrumpy jim3322

    scrumpy jim3322 Bullhitter

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    Sorry, I’m sorting my sock drawer
     
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  4. fixedwheel

    fixedwheel Busy Member

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  5. Ramsay

    Ramsay .... gone Plinking

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  6. gb2017

    gb2017 Posting Addict

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    Cowandchicken and Ramsay like this.
  7. Arrizabalaga

    Arrizabalaga Forum Poet

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    I'll be interested in your findings on this. I went through the same process of weighing and sorting (using identical scales as it happens) and couldn't see any significant difference in accuracy. :thumb:
     
  8. fixedwheel

    fixedwheel Busy Member

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  9. fixedwheel

    fixedwheel Busy Member

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    But is "significant" the expectation, or is it more "tiny, but repeatable" differences?

    At the moment, as I am just getting started, I'm doing it more for consistency while doing shot strings and testing muzzle velocities, rather than any competitive reasons.

    As @Ramsay is in Denmark, am I right in thinking it is unrestricted power, but the calibre is restricted to .177 without licencing?
     
  10. Mice!

    Mice! Very Active

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    @Ramsay have a look for some of @jesim1 posts he's done this kind of thing before for bench rest.
     
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  11. Arrizabalaga

    Arrizabalaga Forum Poet

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    I'll put it another way, at 30 yards I couldn't tell the difference in group size between weighed and unweighted pellets, at 40 yards there may have been a slight improvement but not constant enough to say for sure (perhaps that says something about my shooting ;)).
    Now power testing and tuning is a totally different kettle of fish. My findings are that weighed pellets are an absolute must. I recently set up my rifle with H&N FTTs. The tin says 8.64 grain, average weight according to my scales was 8.78. That equates to 0.2 ft-lbs at around 11-12 ft-lb. Typically I've found that .177 pellets vary by 0.2 grain in a tin, that's getting on for 0.3 ft-lbs difference (if you take the weight on the tin).
     
  12. dodgyeye

    dodgyeye Donator

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    20 fps spread, not criminal :eek::eek: . . . .yes it bloddy is :facepalm:
     
    Ramsay likes this.
  13. Ramsay

    Ramsay .... gone Plinking

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    Quite right you are...:) my HW110 is running at just under 18 ft/lbs..
     
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