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Weighing Pellets

Discussion in 'Anything Airgun Related' started by Michael Boyce, Dec 31, 2019.

  1. eradic8r

    eradic8r Engaging Member

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    I once spent hours weighing and sizing 3 kinds of pellets, FTT's, Exacts and Bisleys only to discover they were within .2 grains and .01mm. so I gave the scales to a dealer and got a life roflmao.gif
     
  2. windymiller

    windymiller bm100 thumbhole

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    soz fat fingers, i just point to the blue one or the yellow one !!!
     
    myiot likes this.
  3. TonyB55

    TonyB55 Engaging Member

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    Why does this keep coming up. The small differences in the weight of good quality pellets makes no difference at all. A few fps either way will not alter your poi. If the difference takes your gun over power it is set too high anyway. Just put on your lucky underpants.
     
  4. Figgy

    Figgy Posting Addict

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    So it told you your pellets were a good batch and all as should be.
    I weigh a sample of a new batch of pellets and use the average for strelock pro.
    Each to their own.
     
  5. jesim1

    jesim1 Kit bitch to the Stars

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    Your a very luck man - or your scales were crap :rolleyes:

    This is not typical, most tins will have three or four distinct weights of pellets with about 0.1gn of each other, and there will be another 20/30 or so pellets that are beyond those at either extremes. The issue is when you get one which is say 8.2gn, and then one which is 8.7gn, and there is a marked difference in the POI - in real life this is only worth bothering about if your into competitions or bench rest, as you won't notice this shooting spinners etc. but there is a marked difference for those who care to look for it - FACT :thumb:
     
    terry1001, Pete236, Wofty and 2 others like this.
  6. Wofty

    Wofty 'This is the way'

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    That hurts likes this.
  7. Pete236

    Pete236 Big Poster

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    My current batch of AA Fields have pellets as light as 8.1 grains and as heavy as 8.8 - that's a big difference in my S410 and is very noticeable past 30 yards.
    I weigh mine before a hunting trip or an HFT shoot, ones that are too light or too heavy get used for plinking.
    And when the weather is sh*te and the TV is worse, too tired to do anything important but it's too early for bed - an hour of pellet weighing is at least doing something
     
  8. Roger Wilkes

    Roger Wilkes Roger

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    I bought a set of the sub £10 jewelry scales.
    My first tin of AAD's 8.44grain spread from 7.9-8.7grains - not good 1) for target/HFT 2) if your PCP is not regulated.
    Since that first tin,had all from the same batch ( not as the 1st tin).
    I now weigh them and group them as 8.2,8.4,and 8.6 grain.
    I use the former in my HW40 pistol,the median in my AA400 and the latter in my HW95.
    Again for target shooting this has to give a " subtly" more consistent result than using them as they come,my results show far less " more subtle" flyers is better groups.
     
  9. myiot

    myiot Engaging Member

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    Why does it make a difference if your PCP is not regulated? I don't understand :(
     
  10. jesim1

    jesim1 Kit bitch to the Stars

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    A non regulated PCP has a power curve and a regulated one does not, have a look at the graph below. So if your chronoing a gun that is unregulated with a full charge the readings will be lower than when it's at around 70/80% full:

    [​IMG]
     
  11. Air arms boy

    Air arms boy Wear sunscreen!

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    I’ve had some AADF 8.4 tip the scales well over 9gr..!

    as said if you take your target shooting seriously it’s worth doing
     
    TR158 likes this.
  12. Cowandchicken

    Cowandchicken Engaging Member

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  13. Farty

    Farty Totty GURU

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    Done it and it's interesting but a pointless task if you want to do a shot string with a crono then yes
     
  14. Kootcha

    Kootcha Newbie

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    I wash, lubricate and weigh pellets. I separate by .1 grains. In a batch of 1000 pellets the deviation from heaviest to lightest is usually .8 grains. Approximately 30 pellets are culled as they are outside this range.This seems to be true with JSB and AA. It appears to be true for 16 gr, 18 gr and 23 gr.
    The question is whether it makes a difference. Certainly a couple of tenths makes no difference to me but there is a significant difference between 15.4 and 16.3.
    I rarely shoot at less than 77 meters and further if there is no wind.
    I have experimented at 40 m and there is not a discernible difference between the extremes.
    My Wolverine prefers 16.1 gr and I have not found the "perfect" weight for my newest gun, a Safari.

    I have a pelletgage on order and I am curious to see if this helps with accuracy.

    Hello from Vancouver Island.
     
    TR158 and Cowandchicken like this.
  15. BallisticBill

    BallisticBill Posting Addict

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    As above (except I weigh 10 in a little plastic pot).

    Before I bought my cheap scales I read a US review which compared 10 "budget" scales against precision scientific scales. "Budget" was their term, the most expensive costing well over $100, possibly over $200... I can't remember exactly, but certainly well above anything I was prepared to pay. To keep it short, the conclusion was they were all inaccurate and the precision indicated on the displays of anything sub-$100 were one decimal place beyond the capabilities of the scales. I bought one of the better cheap models but it's only any good for weighing 10 pellets. If you want to weigh single pellets you won't do it reliably on the cheap.

    Personally I've never found marked differences in JSBs but I know my scales are crap. JSB use single cavity dies. If the volume of lead is a few percent less/more than the volume of the die you will see incomplete skirts or flash (excess squeezed out at the die joints). There may be significant difference in weight between different dies but, provided the pellets look well formed, I wouldn't be surprised if the weights within a batch are more consistent than you can weigh reliably with cheap scales.
     
    Pete2 likes this.
  16. jesim1

    jesim1 Kit bitch to the Stars

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    Remember 99% of this forum is UK based and shooting sub 12fpe, and mostly .177 for comps - a little weight difference is very noticeable on a pellet weighing just over 8gn when shooting paper :thumb:
     
  17. eradic8r

    eradic8r Engaging Member

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    Huge can of worms coming now but I've got to say it so here goes.
    As .177 are the smallest pellets they could, theoretically have the greatest variations in weight no matter how well they are made. This could then make my .22 pellets more consistent in comparison as the variations related to greater overall weight are less.
    Is it me or is this a theoretical breakthrough?
    Please don't kill me !
    Theo
     
    TORNADOS7 and Dayrth like this.
  18. TORNADOS7

    TORNADOS7 Major Poster

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    Chuff me buddy, New Years Day and it's started already... :laff:
     
    Arrizabalaga likes this.
  19. Squintykid

    Squintykid Busy Member

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    Hello
    I shoot an .22 FAC Rapid at -940-975fps and go about the 'unncessary' process of sizing, cleaning, re-lubing JSB/AAs.
    And the process makes a noticeable difference ove 50yds, definitely puts accuracy in the UBR 'Gold medal' category.
    Excluding the most wayward pellets found in the sizing process - weighing is less indicative of accuracy than consistent sizing.
    I use Tinbum sizers to resize head and skirt (see below )
    Dead simple to check a selection against 5.52 and 5.53. Check the skirt indent, check the headsize..use at HP or relegate to plinking.

    Also found that batches with variable headsizes tend to have the most inconsistent weights.

    As you have said >40yds there is no discernible difference from 0.05>0.1 grain?
    My gun will shoot ragged one hole groups with most pellets irrespective of variation at normal sub-12 airgun ranges.

    Something that you may or may not come up with when selecting pellets is JSBs method of compensating for die sizing via the skirt indent?
    It has been a known issue in EU LR/BR competitive circles.
    Apparently this is used to adjust the BC in production?

    I know that the thread is based upon .177 findings but it a damn sight more visible with .22s;)
    IMHO it doesn't improve weight forward balance or stability and may account for the need of critical die selection.

    2018-08-14 15.47.26.jpg
     
  20. Figgy

    Figgy Posting Addict

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    I noticed I have or had a old tin of aadf with very thin skirts. Though it was due to design changes over the years. Better weight forward but skirts are easily damaged.
     

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