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Old 29th January 2010, 10:22 AM
Gibbs Gibbs is offline
Senior Member
Join Date: Jan 2009
Location: North Cornwall
Posts: 397

I tried to do some research on air density as I was aware of pellets dropping faster over water and although I couldn't do any useful maths, I did find out that air density in the UK can vary by about 10% and 10% of anything is big enough to change the fragile trajectory of an air gun pellet.

Higher humidity must also cause more resistance to a pellets flight, but I'm in no hurry to fit a hygrometer to my gun! As most people re-zero their gun before a shoot this will eliminate most of these variables anyway.

However, when you get to a lane incorperating water you will get denser air and probably higher humidity and so briefly you will have that extra drop to deal with.
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