After loosening the grind to 4.5ish ended up with 18g after 11.5 seconds. Decided just to run with the shot and see how it went.
43g...
Actually just worked it out (i think).
When the grinder first arrived the exit chute plugged completely. I used a pipe cleaner to clear...
@johnealey is your grinder really clumpy? Never seen clumps this big before.