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Old 21st November 2015, 02:02 PM
chloe chloe is offline
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Default May be wrong but

But jsb PREMIUMS are quoted as plus or minus 0.001 in grammes from 0.547 grammes so a rounded up converted conversion would give you 8.42 to 8.45 grain. Now other people have questioned the weight range quoted but would they back their scales against jsb factory scales.Sorry if calculations are incorrect, but given in good faith i.e our take on what jsb are claiming.
At 55 yards indoors jsb exact 8.2 to 8.6 you are looking at 2mm this is real world,do it every time we need new batch when we bother to check use works scales cheapest start at 300plus . Chloe and Alan
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Old 21st November 2015, 03:26 PM
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Tench Tench is offline
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Originally Posted by RAIDER View Post
I thought I would weigh a sample of the EXACT PREMIUM I was given, all boxed.
I weighed 15 and they were all within .02 of each other @ 8.62 - 8.64 so there claim is .001 The scales they use must be very good but I don't think mine are that bad.
The claim of accuracy on scales to 0.001 is not a feasible tolerance in a mass production item. That's just my opinion.
Jeremy do your scales display odd numbers for the last digit? mine only have even numbers on the final digit so despite the claims are only accurate to .02gn
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Old 24th November 2015, 01:05 PM
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yes odd numbers as well as even. The variations were quite an eye opener.
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Old 24th November 2015, 01:27 PM
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Ceathreamhnan Ceathreamhnan is online now
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In the past I have weighed a whole tin of the batch I use and they were all 8.35 to 8.55 grain, so now I believe Conor is right and shoot out of the tin
It's the Indian not the Arrow
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Old 24th November 2015, 02:54 PM
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When I've bothered to weigh pellets I've found in the past an 8.91 & an 8.17 (from the same batch but not the same tin). I've started to used weighed pellets again & use all the ones between 8.38 to 8.58 in comps & the rest on the plinking range!
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