Originally Posted by Brian.Samson
The thing to try next is to take your combro down to the club and check the reading on the combro against a club chrono to see if they read the same or thereabouts.
From the sounds of it, you want to rule out a misread on the combro before you start coming up with other theories.
Checking another gun on the same combro goes some way toward suggesting that it isn't a misread, but it doesn't rule it out completely.
The combro is very consistent for the two guns over a full charge and was the last time. I wonder if anyone else has registered any strange numbers on the bfta crono?