I just pulled an Excal. Vortex out of the box and shot 7 bolts over my Chrono. The first 4 were exactly the same - 315 fps. The 5th one did not get picked up by the chrono. the 6 & 7 were again 315 fps. This was shot at a target about 10 yards with graphite bolts and practice tips. New at this so I probably can go faster with the right combo of stuff - lol