Reply To: fx400 accuracy

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Ginuwine1969
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Lik Kris said, with the bottle full, the hammer spring can only do so much to release the air sending the pellet down the barrel, as that pressure fails off, its able to strike the valve harder sending more air down the barrel, thus increase pellet speed.  So when you get a Chrony you can figure out at what fill pressure the hammer spring is most effective (at its peak) then your shot string and pellet speed will be the most consistant.