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  #11  
Old 16th October 2016, 08:53 PM
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If you do go down the route of scales you need the ones that read to 0.01 grains not 0.1 grains. (don't confuse grains with grams)

Be aware though that some 'round' to get the weight so they are unable to display some figures... like they'll skip 8.44 but read 8.45 or 8.43.
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  #12  
Old 16th October 2016, 09:38 PM
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Thanks for that Rob, have you a set you'd recommend?.
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Old 16th October 2016, 09:56 PM
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Most of the milligram scales only do 0.02 gn. Therefore I use the mg units. This is more than enough to sort out the deficient pellets. It is important to let the scale warm up befor use. Also I change the stand to only 3 feet. If you question the accuracy, just reweight some of the first pellets again at the end of the chore.

I use the black one: http://www.ebay.ie/itm/G-G-FC-50g-20...-/141764445181
But I would recommend one with a greater weighting platform like the CT-250.
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  #14  
Old 16th October 2016, 10:02 PM
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Originally Posted by Tel View Post
Thanks for that Rob, have you a set you'd recommend?.
I bought mine years ago. They were called Diamond. They were only cheap. I could get pretty consistent weights when I remeasured. I'm not sure if they're around or not still. There's ones that look similar called Diamond on Ebay but i'm not sure if they're the same or not. Cheaper than the ones I bought.
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  #15  
Old 16th October 2016, 10:18 PM
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Ok cheers, just to be sure I'm taking it that "gn" in weighing terms is grain?.
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  #16  
Old 16th October 2016, 10:31 PM
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Yes. Some scale ads confuse it with gm or g so just make sure it's 0.01gn

0.01grains/gn = 0.0006 grams so if it doesn't do grains then you'll get something that does 0.015gn with 0.001g scales. Which is probably why we may see rounding effects on some scale sets because they don't actually do to the 0.01gn, they weigh in 0.001g and do a conversion.
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  #17  
Old 17th October 2016, 05:51 AM
martin blue eyes martin blue eyes is offline
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Default MTM Mini Digital Reloading Scales

Try MTM Mini Digital Reloading Scales you can get them on ebay or Redbeck for 36 as they are sold for the job.
it only takes a minuet on google to find them.

Cheers

Martin
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  #18  
Old 17th October 2016, 09:14 AM
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Quote:
Originally Posted by john79 View Post
i have these https://www.ourweigh.co.uk/pocket-mi...rat-scale.html and have found them to be very accurate
+1 for these, very accurate and long lasting.
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  #19  
Old 17th October 2016, 10:28 AM
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Originally Posted by martin blue eyes View Post
Try MTM Mini Digital Reloading Scales you can get them on ebay or Redbeck for 36 as they are sold for the job.
it only takes a minuet on google to find them.

Cheers

Martin
Says they're only accurate to +/- 0.1gn
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  #20  
Old 17th October 2016, 12:45 PM
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Hi
Please don't confuse sensitivity with accuracy. You can get scales which are sensitive enough to consistently weigh a pellet (and you should try weighing the same pellet 10x just to see if there is variability (that makes a difference)) but if you want that number to be accurate as well then you will pay a lot more (consumer legislation, etc).

Best thing is to pick a tin from a batch and have 5 dishes. Just decide what range you think is worth using (e.g. JSB Exact say 0.547g so I would use 0.545 to 0.550 as the middle dish, either side 0.530 - 0.544 and 0.551 - 0.565). You will soon get a feel for the range in weights as most should be in the middle dish, a reasonable number either side and few (if any) in the real outliers - way too light or too heavy. The ranges will vary depending on the accuracy of the scales (you pay more!) but you can adjust your 'bin' ranges with less accurate scales - you just need consistency (and frequent re-Tare-ing as the zero drifts). Even your body heat will affect sensitive scales.
No need to count them, just weigh the groups and divide by your 'centre' weight.

Bin the real outliers but then shove the middle 3 dishes back in the tin as they are all near enough (weight differences being in the 'length' of a pellet as they are nibbles of wire and not molten lead!

You soon get a feel for a batch quite quickly and there is no need to weigh them all. If there is an awful asymmetry then maybe try another batch :-)

Oh and thee outliers work fine - the consistency is really only needed beyond 45yds.

Very tedious to these things properly but anyone who has worked in a lab knows such things are worth doing consistently.
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