Hard and Soft Pellets

[evert]

....
So in rank order I have:
Accupel (Hard), H&N FTT, Eley Wasp, FX, Hobby, Superdome, JSB, AA Field, Marksman (Soft)
....

Interesting, because FX pellets are always assumed to be rebranded JSBs.
Could this mean that JSB do not always use the same alloy?

[Phil Russell]

Interesting, because FX pellets are always assumed to be rebranded JSBs.
Could this mean that JSB do not always use the same alloy?

My data may well not be absolutely accurate even though I think it is indicative when used to compare pellets. If you look at the .177 pellet data you will see that JSB and FX are extremely close on mean height ... vary by 0.05mm but when I look at individual pellet data this 0.05mm could well be due to sampling error (I have not analysed the data to that degree). Mean pellet compression was also very close. Its only when you go to the 'rod' data that you see a difference with JSB being marginally softer. Why the discrepancy? If we assume that the rod data are the more accurate and JSB are truly softer than FX then the only explanation I can think of for the similarity in pellet data is that the pellets vary slightly in design i.e. they are not identical moulds but even so, I suspect differences would be very small. and possibly to do with skirt thickness. Maybe JSB skirts are very slightly thicker than FX which makes the JSB appear to be the same as FX in the pellet test.
Cheers, Phil