So the chrony data on mine from Airgun Pro Shop when they tuned says it averaged 837 fps yielding 22 ft lbs using a Hatsan Vortex Express pellet weighing 14.13g. The only thing is, every Hatsan Vortex Express I see on line weighs 13.12g.?
Just for clarification, all of my Chrony samples are taken within 12" of the muzzle. I have a sled I use when gathering data that holds the rifle and keeps the muzzle very close to the first sensor, and puts the pellets in the same spot every time.