Nick,
I should have mentioned initially what the pellets were weighed on.
I don't have access to the Sartorious scales anymore - bugger
I do have a 5 dp balance at home, but it is an old Stanton SM12 two (2) pan :
http://stanton-instruments.co.uk/page18.html
and it would take a very long time to measure one (1) hundred pellets
(It took almost three (3) hours using the Sartorious !)
WRT reporting spurious accuracy in measurements, I agree - it seems to have taken a serious hold now that everything has a digital read-out !
Have fun & a good weekend
Best regards
Russ