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Can anyone teach me about JSB (and variant) batch numbers please?

Discussion in 'Anything Airgun Related' started by cloverleaf, Feb 25, 2014.

  1. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    Following on from the 50m pellet uber-test I conducted recently, I'm looking to do some batch testing of one particular mass and shape. Given their popularity and abundance it seems sensible to try the 8.44gn flavour first (sold as JSB Exact, Air Arms Field, Daystate Sovereign, Daystate Select (now discontinued), FX summot-or-others..).

    I'm generally happy to pull from a pool encompassing any of these brands since they're all from the same source and of broadly the same mass and shape. I would like to know more about the production batch numbers on the tins, though.

    The JSBs have the familiar orange sticker on their underside, with an 8-digit number at the top, a single digit to the bottom left and the head size to the bottom right (the tin I'm looking at reads "43000013 1 4.52"). The Daystate Selects and Daystate FT Heavies (not the same weight, I know) follow the same format (although have different colour stickers).

    Interestingly, the labelling on Air Arms pellets differs from the JSB format. The sticker is a different shape with 2 lines of information at the top (top line; a single digit and the date, bottom line head size, a single digit prefixed with an "S" then two other digits) beneath are a further two lines stating "Made in Czech Republic".

    Daystate Sovereigns have the same size and shape sticker, but displaying five lines of information stating "Rangemaster Sovereign .177 8.8gr (500 per tin) Made in Czech Republic". There's nothing on the tin that could possibly be interpreted as a batch number.


    So.. what can be learned from this and what information would be useful?

    JSB Pellets : It would help to be able to decipher the JSB batch numbers. I found a thread on Shooting the Breeze about it - ultimately it appears that all one can do in an effort to ensure consistency between tins is to buy tins of JSBs that display the same 8-digit code at the top.

    Air Arms Pellets: I'm skeptical that these tins are actually batched like the JSBs, given that there is a lot less space to display the relevant information on the tin's sticker. I'd be interested to hear from anyone who thinks or knows different :)

    Daystate Pellets: It appears that the Selects (and Heavies) are batch numbered just as the JSBs are. The Sovereigns appear at best to be un-numbered according to batch, at worst the sweepings from the Exact swaging room floor (the tins don't even display a head size) - evidently well worth the quid premium over the other JSB offerings :rolleyes:


    So my situation appears thus - I won't be buying / testing with the Sovereigns as, despite their inflated price, there's no traceability or facility to knowingly compare different pellets from different batches. Likewise I'm dubious of spending money on the Air Arms if they don't allow me to differentiate between them by batch.

    I'll take a tin of the Selects (I know where there are still a few left ;)) as they're properly batch numbered. Past this it looks like a fair-sized order might be heading in Intershoot's direction, since those responsible for "officially" importing JSBs into the country seem to have little interest in offering a range greater than one variant in one head size :rolleyes:
     
    Last edited: Feb 25, 2014
  2. Pidlar

    Pidlar Big Poster

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    [​IMG]

    The first number on the air arms pellets is the die number. This is probably the best to look out for rather than batch numbers. In this case these pellets were from die 14.
    Regards,Stu
     
  3. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    Hi Stu,

    Thanks for that - I did wonder about that number. So that gets us a bit closer in that we know the Die no. and DOM; AA potentially leaving out the other information that JSB provide on their tins (QC inspector no. and batch). In the absence of batch numbers I suppose two tins of the same Die no. and DOM could be made from different lead alloys, although I suspect that's somewhat unlikely. Might include some AAs in the testing after all :p
     
  4. Pidlar

    Pidlar Big Poster

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    I've worked for a while at a die casting company and to be fair the ingots of material were also batch marked after their production too. We used to have them delivered in multiples of tonnes so I'd say dependant on batch runs a few days either side of a date will be pretty constant either way.the highest die number for aa fields I have seen at the moment is 24, so there are at least 24 different types of aa field out there at the moment. My thinking may be that the older dies now give the larger sizes eg 4.52 due to wear and tear, and newer dies may produce the smaller sizes.Obviuosly my reference to material type is only generic as pellets are produced using a cold heading process from the material in a wire form.
    Regards, Stu
     
  5. Speed

    Speed Busy Member

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    there is a few threads on STB explaining what all the mumbers mean,

    intershoot allows you to pick the batch number you need, subject to there stock, all other companys just tend to give you any time they have
     
  6. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    Thanks for the info! Your thoughts about the materials and production dates sound entirely plausible.. All I'm really after at the moment is a selection of pellets that will perform differently in my rifle; so that I can compare them to each other at different ranges over the chrono. As long as the pellets have enough info on them to distinguish them from others, I'm happy :)


    Thanks - I've read a few threads over there, but opinions on what the numbers mean seem to vary somewhat. I've noticed the ability to select batch numbers on Intershoot's site (an excellent facility!). It's also interesting to note that, despite being lighter, the Express pellets cost more than the Exact - perhaps attesting to the popularity of the former..
     

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