Okay I took the plunge and bought a ratbuster yesterday. Advertised as doing up to 5.5 ft lbs energy mine (brand new with fresh co2 powerlet fitted is doing strings sub 300FPS now 290X290X14.5 / 450240 equals 2.7 Ft lbs energy. Is this a faulty gun? should I send it back or take the makers to court under the sale of goods and services act? Maybe somebody will tell me it will settle in with use and come up to the expected advertised power levels. Not an expensive investment but one that failed to live up to expectation. Crosman destined to disappoint.