It depends on the point of sail
It depends on the point of sail. We had a 91 and found mid teens on a beat and then move down from there til you have it as flat as you can on a run. The 310 is a very responsive boat and it won't take you long to figure out where to set her up. We moved up to a 361 and love so many aspects of her. Some days I wish, for the sake of pure sailing pleasure, I had the 310 back. Enjoy her!