I really suspect that I am testing with a faulty chrono. Here is some data from the testing with several blasters. The data seems lower than the other stats that I am
HOW FAST does a Nerf gun shoot? | Find out with your phone - YouTube
Should I get the chrono-barrel, or a chronograph? : r/Nerf
So... that chronograph finally arrived! : r/Nerf
Finally broke 220 fps with my Viper. Chronograph numbers will be posted soon.😂 : r/Nerf
Saturnus Chronograph Shroud by Aurich | Download free STL model | Printables.com
Nerf by Numbers: How We Chronograph & Test Blaster Performance – Out of Darts