This model is my first PCP gun I ever bought , Mine is .22 caliber also , With mine it is like 55 fpe and it is loud but very accurate , I remember it was in book single action was half power and double action was full power , I remember trying to pull trigger quick lol , I could not do it , My gun which I still have BTW has a trigger pull of say 4 pounds on single action and double action it is like 35 POUNDS , not ounces , It is a classic I dont use mine no more as I got many modern guns , but this is the perfect gun to make into your modified gun as it has power most guns just cant compete with LOU