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Old 1st November 2013, 07:48 PM
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Tench Tench is offline
WHFTA World Champion 2016.
Join Date: Sep 2009
Location: derby
Posts: 1,416

The pro target has quite a weak hammer spring, if the reg is set to high the hammer cant knock the firing valve open due to the force acting on the back of it resulting in low power, or if the reg is too low there is insuficient pressure to create the power, the setting of the reg output pressure is quite critical to get full power out of these rifles. I would imagine that you have a failed o ring somewhere resultin in either too high or too low reg pressure, it needs a full service!
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