Thread: New jsb pellets
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Old 7th February 2015, 08:09 AM
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rich rich is offline
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Location: Shebbear, N Devon
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Originally Posted by skires View Post
Just a point ...

I still think it's creating a problem that doesn't exist ...

... but ... if you are going to start weighing pellets outside at the chrono. What affect would a decent wind have on a set of scales that are measuring to 0.02gr?
Being bored this morning I just did a little bit of arithmetic on this. Imagine a scale pan 30mm in diameter and a wind at 2 metres per second, close to 5 mph, the dynamic pressure of the wind would introduce an uncertainty of 3% or more about the reading on the display.

This is why fine tolerance weighing in a laboratory is done in a closed cabinet. Getting an accurate pellet weight in the field would be a bigger lottery than getting an accurate velocity.
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