most chrono's read differently
i despise the virtue clocks for this.
if it is not held PERFECTLY you could easily be shooting +/-30fps
technically, its all about how you hold it and if anything is interfering with the reading
the virtue clock is too easy to hold wrong and cause problems, but it could be compounded with an inaccurate chrono
thats what i think you are experiencing.
Ryan “Super_Stanchy” Stanchfield