Hi all i took my son field target shooting today and the first thing the club check was what power my hw100 was kicking out to make sure it wasnt over power and belive me i was very supprise that it was far from that!!! it was way under power prob about 8ft lb!! i have had this gun for about a year and havent used it a great deal so hadnt realised the lack of power. has any one had a simular problem or may no the cause???? its not losing air pressure at all.