Shooting portraits.

So in the UK we have had the worst weather and its been dim gloomy windy and wet the ideal weather for high speed black and white photography, I had used the ilford delta 3200 before and i got really grainy results but then i researched into it discovered the film speed is actually a 1000 ISO and labs are forced to push process the film with the given 3200 ISO speed. So to stop the contrast being too bold i rated the film at 1600ISO and developed it at 3200 for a mid range contrast 11 mins Fotospeed Dev 1 Minute Stop and 5 minutes Fix.