Quote Originally Posted by Sean
Having trouble finding this, can anyone help? thanks!
Massive Dev Chart says 9.5 min. for ISO 200 i ID11 1+1.
I have developed it for 11.5 minutes for 320. So I would try pretty much in between:

@ISO 250 and develop for 10.5 min. in ID11 1+1

Greetings Morten