I use a fairly loose grip, with no sling. It could be torque, but I just wonder if I could be that consistent in my grip, that I torque the same every time. Also, I wouldn't think I am getting any contact with the rest, as it is a drop away, although, I suppose anything is possible. I will investigate both and find out. As I was typing this, it occured to me, could I be making contact with the cables? Again, I don't think so. N E way, anything else would be appreciated.