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Old 8th April 2015, 08:25 AM
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Brian.Samson Brian.Samson is offline
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Join Date: Jun 2009
Member of: Pontefract, Doncaster Airgun Range
Location: Doncaster
Posts: 2,324

Thanks Sven, good to have more info on the subject.

The reason Rob asked was because I'm sure you know that if you actually measure the head sizes from a selection of pellets from a tin, you'll get quite a big variation, and rarely get an average figure of the size quoted on the tin, effectively making the quoted head size a meaningless number.

I know I have a tin of 4.52's and a tin of 4.51's in my pellet crate at the moment where the 4.52's are much smaller than the 4.51's. The 4.51's are a tight fit in my barrel and the 4.52's literally fall out if I hold the rifle pointing upwards.

The only thing I take for granted now with JSB's is that tins with exactly the same numbers (die/batch/headsize, everything!) then those pellets all seem to perform the same.

I can't rely on one die 34 being as good as another die 34 from a different batch even if outwardly they look exactly the same.

Perhaps they should change the pellet name to "JSB not as Exact as you'd hope"
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