Hi, I have an Oehler 35p with the 4' bar. I have a few questions: As fellow owners know the Chronograph prints out two separate velocities for each shot. I am assuming the first reading is for the first set of screens and the second for the second? The difference between the two readings averages about 14 fps. Which reading is the most accurate to use? Also I was reading the manual and it tells you to add in the velocity that is lost in the 10' gap between the muzzle and the chronograph. Do you guys add in the lost velocity? What about when putting velocities in ballistic programs, for a ballistics program would you use the actual reading on the chrono or the actual velocity at the muzzle???? If the two readings are for each set of screens then I can assume that the difference is the velocity loss for the two feet between the middle of the screens. So I would have approx 7 fps loss per foot, mulitplied by 10 feet gives me 70 fps loss by the time the bullet gets to the chronograph. I may be getting into too much detail but I want to know the answers to these questions.