This is my philosophy about this much debated question: if you have to ask, then go to a shop.
Din is only one factor that can cause prerelease. At your weight & height and with that din, binding release while turning or stopping is most likely caused by insufficient forward pressure....or you are a 130lbs Seth Morrison....
Listen, you like to ski right? Your need your knees to ski. So quit messing around, it takes very little time, effort and a few coins to get the tech at the pro shop to make sure you are set up right, and then you can ski with minimum risk. Maybe the tech will let you watch while he sets you up, could be educational....
Check your gear azzybish$, I am 198lbs, 5'9" and a type III+ and I set my din at 9.