It is factory barrel and I am not sure of any contour spec for DTA, they make only one contour that I am aware of. These are a 9" twist if I remember correctly and a 3/4"x24" threaded for a can. I shot out a few of them with 190 ATips and 190gn Bergers when I was on a DTA kick and they shoot fantastic. It would be #2 in this picture.